/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:01:10,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:01:10,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:01:10,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:01:10,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:01:10,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:01:10,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:01:10,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:01:10,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:01:10,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:01:10,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:01:10,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:01:10,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:01:10,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:01:10,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:01:10,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:01:10,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:01:10,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:01:10,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:01:10,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:01:10,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:01:10,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:01:10,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:01:10,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:01:10,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:01:10,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:01:10,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:01:10,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:01:10,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:01:10,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:01:10,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:01:10,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:01:10,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:01:10,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:01:10,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:01:10,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:01:10,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:01:10,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:01:10,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:01:10,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:01:10,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:01:10,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:01:10,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:01:10,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:01:10,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:01:10,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:01:10,436 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:01:10,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:01:10,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:01:10,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:01:10,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:01:10,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:01:10,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:01:10,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:01:10,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:01:10,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:01:10,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:01:10,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:01:10,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:01:10,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:01:10,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:01:10,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:01:10,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:01:10,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:01:10,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:01:10,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:01:10,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:01:10,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:01:10,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:01:10,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:01:10,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:01:10,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:01:10,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:01:10,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:01:10,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:01:10,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:01:10,790 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:01:10,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-15 00:01:10,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7949094f0/2356fd95659f46519ef773183e73dd33/FLAG967b60834 [2020-10-15 00:01:11,292 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:01:11,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-15 00:01:11,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7949094f0/2356fd95659f46519ef773183e73dd33/FLAG967b60834 [2020-10-15 00:01:11,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7949094f0/2356fd95659f46519ef773183e73dd33 [2020-10-15 00:01:11,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:01:11,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:01:11,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:01:11,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:01:11,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:01:11,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:11,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11, skipping insertion in model container [2020-10-15 00:01:11,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:11,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:01:11,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:01:11,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:01:11,937 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:01:11,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:01:11,972 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:01:11,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11 WrapperNode [2020-10-15 00:01:11,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:01:11,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:01:11,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:01:11,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:01:11,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:11,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:11,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:11,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:12,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:12,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:12,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... [2020-10-15 00:01:12,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:01:12,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:01:12,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:01:12,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:01:12,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:01:12,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:01:12,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:01:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:01:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:01:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:01:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:01:12,409 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:01:12,409 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:01:12,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:12 BoogieIcfgContainer [2020-10-15 00:01:12,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:01:12,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:01:12,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:01:12,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:01:12,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:11" (1/3) ... [2020-10-15 00:01:12,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c36f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:12, skipping insertion in model container [2020-10-15 00:01:12,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:11" (2/3) ... [2020-10-15 00:01:12,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c36f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:12, skipping insertion in model container [2020-10-15 00:01:12,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:12" (3/3) ... [2020-10-15 00:01:12,422 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2020-10-15 00:01:12,432 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:01:12,440 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:01:12,452 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:01:12,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:01:12,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:01:12,476 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:01:12,476 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:01:12,476 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:01:12,476 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:01:12,477 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:01:12,477 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:01:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-15 00:01:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:01:12,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:12,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:12,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-15 00:01:12,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:12,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135140243] [2020-10-15 00:01:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:12,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:12,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:01:12,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-15 00:01:12,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:12,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:01:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:01:12,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:01:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:12,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:12,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:01:12,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:12,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:12,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:12,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:12,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135140243] [2020-10-15 00:01:12,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:01:12,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:01:12,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214608084] [2020-10-15 00:01:12,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:01:12,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:01:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:01:12,863 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-15 00:01:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:13,023 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-15 00:01:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:01:13,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-15 00:01:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:13,035 INFO L225 Difference]: With dead ends: 41 [2020-10-15 00:01:13,035 INFO L226 Difference]: Without dead ends: 14 [2020-10-15 00:01:13,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:01:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-15 00:01:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-15 00:01:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 00:01:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-15 00:01:13,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-10-15 00:01:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:13,078 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-15 00:01:13,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:01:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-15 00:01:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:01:13,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:13,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:13,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:01:13,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2020-10-15 00:01:13,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:13,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582194347] [2020-10-15 00:01:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:01:13,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:13,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-15 00:01:13,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:01:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:13,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:01:13,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:13,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:13,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582194347] [2020-10-15 00:01:13,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:13,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:01:13,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531965518] [2020-10-15 00:01:13,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:01:13,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:01:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:01:13,317 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2020-10-15 00:01:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:13,385 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-15 00:01:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:01:13,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-15 00:01:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:13,387 INFO L225 Difference]: With dead ends: 21 [2020-10-15 00:01:13,387 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:01:13,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:01:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:01:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-15 00:01:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 00:01:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-15 00:01:13,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2020-10-15 00:01:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:13,394 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-15 00:01:13,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:01:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-15 00:01:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:01:13,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:13,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:13,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:01:13,396 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1954423409, now seen corresponding path program 2 times [2020-10-15 00:01:13,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:13,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718659560] [2020-10-15 00:01:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:01:13,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-15 00:01:13,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:01:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:13,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:01:13,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:13,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:01:13,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:13,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:01:13,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718659560] [2020-10-15 00:01:13,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:01:13,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 00:01:13,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515307544] [2020-10-15 00:01:13,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:01:13,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:01:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:01:13,615 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2020-10-15 00:01:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:13,663 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-15 00:01:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:01:13,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-15 00:01:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:13,667 INFO L225 Difference]: With dead ends: 27 [2020-10-15 00:01:13,667 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:01:13,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:01:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:01:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-15 00:01:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 00:01:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-15 00:01:13,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2020-10-15 00:01:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:13,676 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-15 00:01:13,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:01:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-15 00:01:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:01:13,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:13,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:13,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:01:13,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1891741908, now seen corresponding path program 1 times [2020-10-15 00:01:13,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:13,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497919996] [2020-10-15 00:01:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:01:13,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-15 00:01:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:01:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:01:13,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:13,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:13,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:13,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:13,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:13,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:13,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:13,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:13,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:13,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:13,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497919996] [2020-10-15 00:01:13,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:13,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:01:13,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144913688] [2020-10-15 00:01:13,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:01:13,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:01:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:01:13,889 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 7 states. [2020-10-15 00:01:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:13,942 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2020-10-15 00:01:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:01:13,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-15 00:01:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:13,944 INFO L225 Difference]: With dead ends: 33 [2020-10-15 00:01:13,944 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 00:01:13,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 00:01:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-15 00:01:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:01:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-10-15 00:01:13,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 16 [2020-10-15 00:01:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:13,952 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-10-15 00:01:13,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:01:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-10-15 00:01:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:01:13,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:13,953 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:13,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:01:13,954 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:13,954 INFO L82 PathProgramCache]: Analyzing trace with hash -89769689, now seen corresponding path program 2 times [2020-10-15 00:01:13,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:13,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326975744] [2020-10-15 00:01:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:01:14,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:14,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-15 00:01:14,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:01:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:01:14,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:01:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:14,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:14,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:14,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:14,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326975744] [2020-10-15 00:01:14,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:14,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:01:14,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215597041] [2020-10-15 00:01:14,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:01:14,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:01:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:01:14,175 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2020-10-15 00:01:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:14,222 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-15 00:01:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:01:14,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-15 00:01:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:14,224 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:01:14,224 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:01:14,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:01:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-15 00:01:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 00:01:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-10-15 00:01:14,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2020-10-15 00:01:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:14,232 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-10-15 00:01:14,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:01:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-10-15 00:01:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:01:14,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:14,234 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:14,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:01:14,234 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 733712482, now seen corresponding path program 3 times [2020-10-15 00:01:14,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:14,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803774743] [2020-10-15 00:01:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:01:14,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-15 00:01:14,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:01:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:01:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:14,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:14,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:14,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:14,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:14,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803774743] [2020-10-15 00:01:14,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:14,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:01:14,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989057228] [2020-10-15 00:01:14,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:01:14,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:01:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:14,502 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 9 states. [2020-10-15 00:01:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:14,649 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-10-15 00:01:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:01:14,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-15 00:01:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:14,651 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:01:14,652 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:01:14,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:01:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:01:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-15 00:01:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:01:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2020-10-15 00:01:14,662 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 20 [2020-10-15 00:01:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:14,662 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2020-10-15 00:01:14,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2020-10-15 00:01:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:01:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:14,664 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:14,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:01:14,665 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:14,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1826096349, now seen corresponding path program 4 times [2020-10-15 00:01:14,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:14,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457053987] [2020-10-15 00:01:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:01:14,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:14,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-15 00:01:14,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:01:14,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:14,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:01:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:14,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:14,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:14,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:14,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:14,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457053987] [2020-10-15 00:01:14,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:14,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:01:14,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076402928] [2020-10-15 00:01:14,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:01:14,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:14,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:01:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:14,938 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 10 states. [2020-10-15 00:01:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:15,060 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-10-15 00:01:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:15,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-15 00:01:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:15,062 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:01:15,062 INFO L226 Difference]: Without dead ends: 46 [2020-10-15 00:01:15,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-15 00:01:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-15 00:01:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:01:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-15 00:01:15,070 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 22 [2020-10-15 00:01:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:15,071 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-15 00:01:15,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:01:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-15 00:01:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:01:15,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:15,072 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:15,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:01:15,073 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash -659994984, now seen corresponding path program 5 times [2020-10-15 00:01:15,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:15,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212998180] [2020-10-15 00:01:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:01:15,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:15,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-15 00:01:15,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:01:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:01:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:15,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:15,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:15,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:15,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:15,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212998180] [2020-10-15 00:01:15,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:15,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:01:15,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088220374] [2020-10-15 00:01:15,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:01:15,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:01:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:01:15,352 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 11 states. [2020-10-15 00:01:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:15,513 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2020-10-15 00:01:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:01:15,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-15 00:01:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:15,515 INFO L225 Difference]: With dead ends: 57 [2020-10-15 00:01:15,515 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:01:15,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:01:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-15 00:01:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 00:01:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-10-15 00:01:15,523 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 24 [2020-10-15 00:01:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:15,524 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-10-15 00:01:15,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:01:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-10-15 00:01:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:01:15,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:15,525 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:15,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:01:15,526 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1791949421, now seen corresponding path program 6 times [2020-10-15 00:01:15,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:15,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257117385] [2020-10-15 00:01:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:01:15,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-15 00:01:15,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:01:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:01:15,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:15,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:15,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:15,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:15,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:15,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:15,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257117385] [2020-10-15 00:01:15,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:15,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:01:15,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028217048] [2020-10-15 00:01:15,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:01:15,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:01:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:01:15,846 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 12 states. [2020-10-15 00:01:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:15,909 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-15 00:01:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:01:15,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-15 00:01:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:15,911 INFO L225 Difference]: With dead ends: 63 [2020-10-15 00:01:15,911 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:01:15,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:01:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:01:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-15 00:01:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:01:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2020-10-15 00:01:15,919 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 26 [2020-10-15 00:01:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:15,919 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2020-10-15 00:01:15,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:01:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2020-10-15 00:01:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:01:15,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:15,921 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:15,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:01:15,921 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1321529806, now seen corresponding path program 7 times [2020-10-15 00:01:15,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:15,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766703990] [2020-10-15 00:01:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:01:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-15 00:01:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:16,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:01:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:01:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:16,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:16,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:16,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:16,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:16,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:16,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:16,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766703990] [2020-10-15 00:01:16,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:16,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:01:16,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407919792] [2020-10-15 00:01:16,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:01:16,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:01:16,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:01:16,381 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand 13 states. [2020-10-15 00:01:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:16,596 INFO L93 Difference]: Finished difference Result 69 states and 96 transitions. [2020-10-15 00:01:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:01:16,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-15 00:01:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:16,598 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:01:16,598 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:01:16,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:01:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-15 00:01:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 00:01:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2020-10-15 00:01:16,608 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 28 [2020-10-15 00:01:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:16,608 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2020-10-15 00:01:16,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:01:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2020-10-15 00:01:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:01:16,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:16,610 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:16,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:01:16,610 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash -217138359, now seen corresponding path program 8 times [2020-10-15 00:01:16,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:16,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094368402] [2020-10-15 00:01:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:01:17,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:01:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:17,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:17,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094368402] [2020-10-15 00:01:17,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:01:17,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844678074] [2020-10-15 00:01:17,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:01:17,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:01:17,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:01:17,146 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand 14 states. [2020-10-15 00:01:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:17,204 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-15 00:01:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:01:17,205 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-15 00:01:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:17,206 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:01:17,206 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:01:17,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:01:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 00:01:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 00:01:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 100 transitions. [2020-10-15 00:01:17,214 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 100 transitions. Word has length 30 [2020-10-15 00:01:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:17,214 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 100 transitions. [2020-10-15 00:01:17,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:01:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 100 transitions. [2020-10-15 00:01:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:01:17,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:17,216 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:17,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:01:17,216 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1408495100, now seen corresponding path program 9 times [2020-10-15 00:01:17,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:17,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820075020] [2020-10-15 00:01:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:01:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-15 00:01:17,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:01:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:17,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820075020] [2020-10-15 00:01:17,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:01:17,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686250009] [2020-10-15 00:01:17,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:01:17,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:01:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:17,748 INFO L87 Difference]: Start difference. First operand 70 states and 100 transitions. Second operand 15 states. [2020-10-15 00:01:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:17,955 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2020-10-15 00:01:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:01:17,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-15 00:01:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:17,957 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:01:17,957 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:01:17,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:01:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-15 00:01:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 00:01:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2020-10-15 00:01:17,965 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 32 [2020-10-15 00:01:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:17,966 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2020-10-15 00:01:17,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:01:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2020-10-15 00:01:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:01:17,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:17,967 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:17,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:01:17,968 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash 453944831, now seen corresponding path program 10 times [2020-10-15 00:01:17,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:17,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740538648] [2020-10-15 00:01:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:18,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:01:18,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-15 00:01:18,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:18,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:01:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:18,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:01:18,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:18,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:18,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:18,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:18,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:18,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:18,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740538648] [2020-10-15 00:01:18,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:18,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:01:18,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745192820] [2020-10-15 00:01:18,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:01:18,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:01:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:18,545 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 16 states. [2020-10-15 00:01:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:18,616 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2020-10-15 00:01:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:01:18,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-15 00:01:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:18,618 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:01:18,618 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:01:18,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:01:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-15 00:01:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 00:01:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 118 transitions. [2020-10-15 00:01:18,632 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 118 transitions. Word has length 34 [2020-10-15 00:01:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:18,632 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 118 transitions. [2020-10-15 00:01:18,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:01:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 118 transitions. [2020-10-15 00:01:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:01:18,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:18,635 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:18,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:01:18,636 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -742643910, now seen corresponding path program 11 times [2020-10-15 00:01:18,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:18,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60715571] [2020-10-15 00:01:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:18,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:19,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:01:19,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:19,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-15 00:01:19,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:19,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:01:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:01:19,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:19,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:19,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:19,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:19,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:19,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60715571] [2020-10-15 00:01:19,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:19,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:01:19,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430866977] [2020-10-15 00:01:19,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:01:19,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:01:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:01:19,369 INFO L87 Difference]: Start difference. First operand 82 states and 118 transitions. Second operand 17 states. [2020-10-15 00:01:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:19,692 INFO L93 Difference]: Finished difference Result 93 states and 132 transitions. [2020-10-15 00:01:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:01:19,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-15 00:01:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:19,693 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:01:19,693 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:01:19,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:01:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:01:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-15 00:01:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 00:01:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2020-10-15 00:01:19,709 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 36 [2020-10-15 00:01:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:19,710 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2020-10-15 00:01:19,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:01:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2020-10-15 00:01:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:01:19,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:19,714 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:19,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:01:19,714 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 386811317, now seen corresponding path program 12 times [2020-10-15 00:01:19,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:19,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297860950] [2020-10-15 00:01:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:20,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:01:20,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-15 00:01:20,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:20,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:20,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:01:20,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:20,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:01:20,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:20,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:20,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:20,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:20,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:20,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:20,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:20,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:20,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:20,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:20,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:20,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297860950] [2020-10-15 00:01:20,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:20,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:20,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072366705] [2020-10-15 00:01:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:20,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:20,453 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand 18 states. [2020-10-15 00:01:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:20,529 INFO L93 Difference]: Finished difference Result 99 states and 141 transitions. [2020-10-15 00:01:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:01:20,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-15 00:01:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:20,531 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:01:20,532 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 00:01:20,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 00:01:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-15 00:01:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 00:01:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 136 transitions. [2020-10-15 00:01:20,541 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 136 transitions. Word has length 38 [2020-10-15 00:01:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:20,542 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 136 transitions. [2020-10-15 00:01:20,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 136 transitions. [2020-10-15 00:01:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:01:20,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:20,544 INFO L422 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:20,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:01:20,544 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -833441424, now seen corresponding path program 13 times [2020-10-15 00:01:20,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:20,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809353670] [2020-10-15 00:01:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:20,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:21,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:01:21,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:21,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-15 00:01:21,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:21,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:21,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:01:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:21,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:21,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:21,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:21,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:21,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:21,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809353670] [2020-10-15 00:01:21,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:21,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:01:21,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611226234] [2020-10-15 00:01:21,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:01:21,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:01:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:01:21,297 INFO L87 Difference]: Start difference. First operand 94 states and 136 transitions. Second operand 19 states. [2020-10-15 00:01:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:21,621 INFO L93 Difference]: Finished difference Result 105 states and 150 transitions. [2020-10-15 00:01:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:01:21,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-15 00:01:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:21,622 INFO L225 Difference]: With dead ends: 105 [2020-10-15 00:01:21,623 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:01:21,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=754, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:01:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:01:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-15 00:01:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 00:01:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2020-10-15 00:01:21,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 40 [2020-10-15 00:01:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:21,635 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2020-10-15 00:01:21,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:01:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2020-10-15 00:01:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:01:21,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:21,637 INFO L422 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:21,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:01:21,637 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash -970253717, now seen corresponding path program 14 times [2020-10-15 00:01:21,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:21,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040356713] [2020-10-15 00:01:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:22,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:01:22,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:22,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-15 00:01:22,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:22,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:01:22,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:22,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:01:22,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:22,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:22,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:22,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:22,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:22,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040356713] [2020-10-15 00:01:22,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:22,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:01:22,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460646851] [2020-10-15 00:01:22,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:01:22,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:22,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:01:22,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:22,293 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand 20 states. [2020-10-15 00:01:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:22,644 INFO L93 Difference]: Finished difference Result 111 states and 159 transitions. [2020-10-15 00:01:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:01:22,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-15 00:01:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:22,645 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:01:22,645 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 00:01:22,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=844, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:01:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 00:01:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-15 00:01:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 00:01:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 154 transitions. [2020-10-15 00:01:22,657 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 154 transitions. Word has length 42 [2020-10-15 00:01:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:22,657 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 154 transitions. [2020-10-15 00:01:22,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:01:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 154 transitions. [2020-10-15 00:01:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:01:22,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:22,658 INFO L422 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:22,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:01:22,658 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash 697118886, now seen corresponding path program 15 times [2020-10-15 00:01:22,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:22,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927530269] [2020-10-15 00:01:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:23,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:01:23,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-15 00:01:23,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:23,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:01:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:01:23,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:23,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:23,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:23,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:23,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:23,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:23,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:23,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927530269] [2020-10-15 00:01:23,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:23,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:01:23,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652287000] [2020-10-15 00:01:23,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:01:23,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:23,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:01:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:01:23,594 INFO L87 Difference]: Start difference. First operand 106 states and 154 transitions. Second operand 21 states. [2020-10-15 00:01:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:23,665 INFO L93 Difference]: Finished difference Result 117 states and 168 transitions. [2020-10-15 00:01:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:01:23,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-15 00:01:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:23,666 INFO L225 Difference]: With dead ends: 117 [2020-10-15 00:01:23,666 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:01:23,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:01:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:01:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-15 00:01:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 00:01:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 163 transitions. [2020-10-15 00:01:23,674 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 163 transitions. Word has length 44 [2020-10-15 00:01:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:23,674 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 163 transitions. [2020-10-15 00:01:23,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:01:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 163 transitions. [2020-10-15 00:01:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:01:23,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:23,675 INFO L422 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:23,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:01:23,676 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1019388961, now seen corresponding path program 16 times [2020-10-15 00:01:23,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:23,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827916537] [2020-10-15 00:01:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:01:24,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:24,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-15 00:01:24,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:01:24,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:24,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:01:24,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:24,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:24,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827916537] [2020-10-15 00:01:24,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:24,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:01:24,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273238617] [2020-10-15 00:01:24,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:01:24,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:01:24,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:24,537 INFO L87 Difference]: Start difference. First operand 112 states and 163 transitions. Second operand 22 states. [2020-10-15 00:01:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:24,612 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2020-10-15 00:01:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:01:24,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-15 00:01:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:24,613 INFO L225 Difference]: With dead ends: 123 [2020-10-15 00:01:24,614 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 00:01:24,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:01:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 00:01:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-15 00:01:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 00:01:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 172 transitions. [2020-10-15 00:01:24,621 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 172 transitions. Word has length 46 [2020-10-15 00:01:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:24,622 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 172 transitions. [2020-10-15 00:01:24,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:01:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 172 transitions. [2020-10-15 00:01:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:01:24,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:24,623 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:24,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:01:24,623 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1483285724, now seen corresponding path program 17 times [2020-10-15 00:01:24,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:24,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239222336] [2020-10-15 00:01:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:01:25,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:25,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:01:25,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:25,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:25,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:25,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:25,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:25,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 70 proven. 289 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:25,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239222336] [2020-10-15 00:01:25,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:25,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:01:25,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798457518] [2020-10-15 00:01:25,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:01:25,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:01:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:25,526 INFO L87 Difference]: Start difference. First operand 118 states and 172 transitions. Second operand 20 states. [2020-10-15 00:01:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:25,663 INFO L93 Difference]: Finished difference Result 741 states and 1121 transitions. [2020-10-15 00:01:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:01:25,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-15 00:01:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:25,669 INFO L225 Difference]: With dead ends: 741 [2020-10-15 00:01:25,670 INFO L226 Difference]: Without dead ends: 736 [2020-10-15 00:01:25,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-15 00:01:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 51. [2020-10-15 00:01:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:01:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2020-10-15 00:01:25,688 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 48 [2020-10-15 00:01:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:25,688 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2020-10-15 00:01:25,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:01:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2020-10-15 00:01:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:01:25,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:25,690 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:25,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:01:25,690 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 611476183, now seen corresponding path program 18 times [2020-10-15 00:01:25,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:25,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267382711] [2020-10-15 00:01:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:25,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:26,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:01:26,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:26,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-15 00:01:26,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:26,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:01:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:01:26,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:26,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:26,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:26,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 324 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:26,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267382711] [2020-10-15 00:01:26,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:26,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:01:26,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709088125] [2020-10-15 00:01:26,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:01:26,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:01:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:01:26,487 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand 21 states. [2020-10-15 00:01:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:26,617 INFO L93 Difference]: Finished difference Result 135 states and 195 transitions. [2020-10-15 00:01:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:01:26,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-15 00:01:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:26,618 INFO L225 Difference]: With dead ends: 135 [2020-10-15 00:01:26,618 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 00:01:26,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:01:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 00:01:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 53. [2020-10-15 00:01:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:01:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-10-15 00:01:26,627 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 50 [2020-10-15 00:01:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:26,627 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-10-15 00:01:26,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:01:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-10-15 00:01:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:01:26,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:26,628 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:26,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:01:26,628 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 321130002, now seen corresponding path program 19 times [2020-10-15 00:01:26,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:26,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671724908] [2020-10-15 00:01:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:27,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:01:27,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:27,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-15 00:01:27,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:27,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:01:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:01:27,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:27,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:27,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 78 proven. 361 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:27,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671724908] [2020-10-15 00:01:27,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:27,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:01:27,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486829122] [2020-10-15 00:01:27,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:01:27,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:01:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:27,516 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 22 states. [2020-10-15 00:01:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:27,686 INFO L93 Difference]: Finished difference Result 141 states and 204 transitions. [2020-10-15 00:01:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:01:27,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-15 00:01:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:27,688 INFO L225 Difference]: With dead ends: 141 [2020-10-15 00:01:27,688 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 00:01:27,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 00:01:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 55. [2020-10-15 00:01:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:01:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-10-15 00:01:27,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 52 [2020-10-15 00:01:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:27,702 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-10-15 00:01:27,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:01:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-10-15 00:01:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:01:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:27,703 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:27,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:01:27,703 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 471324301, now seen corresponding path program 20 times [2020-10-15 00:01:27,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:27,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877438850] [2020-10-15 00:01:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:28,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:28,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:01:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:28,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:28,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:28,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:28,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:28,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:28,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:28,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 82 proven. 400 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:28,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877438850] [2020-10-15 00:01:28,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:28,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:01:28,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070487439] [2020-10-15 00:01:28,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:01:28,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:01:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:01:28,742 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 23 states. [2020-10-15 00:01:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:28,971 INFO L93 Difference]: Finished difference Result 147 states and 213 transitions. [2020-10-15 00:01:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:01:28,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-15 00:01:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:28,972 INFO L225 Difference]: With dead ends: 147 [2020-10-15 00:01:28,972 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 00:01:28,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:01:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 00:01:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 57. [2020-10-15 00:01:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:01:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2020-10-15 00:01:28,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 54 [2020-10-15 00:01:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:28,982 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2020-10-15 00:01:28,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:01:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2020-10-15 00:01:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:01:28,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:28,983 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:28,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:01:28,984 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1220842424, now seen corresponding path program 21 times [2020-10-15 00:01:28,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:28,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379504377] [2020-10-15 00:01:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:29,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:01:29,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-15 00:01:29,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:29,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:01:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:01:29,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:29,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:29,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:29,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:29,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:29,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:29,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:29,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:29,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 86 proven. 441 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:29,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379504377] [2020-10-15 00:01:29,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:29,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:01:29,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620736253] [2020-10-15 00:01:29,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:01:29,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:01:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:01:29,952 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand 24 states. [2020-10-15 00:01:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:30,169 INFO L93 Difference]: Finished difference Result 153 states and 222 transitions. [2020-10-15 00:01:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:01:30,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-15 00:01:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:30,171 INFO L225 Difference]: With dead ends: 153 [2020-10-15 00:01:30,171 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 00:01:30,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:01:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 00:01:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 59. [2020-10-15 00:01:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:01:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 83 transitions. [2020-10-15 00:01:30,182 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 83 transitions. Word has length 56 [2020-10-15 00:01:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:30,182 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 83 transitions. [2020-10-15 00:01:30,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:01:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 83 transitions. [2020-10-15 00:01:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:01:30,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:30,183 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:30,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:01:30,183 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 399540035, now seen corresponding path program 22 times [2020-10-15 00:01:30,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:30,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775408381] [2020-10-15 00:01:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:01:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-15 00:01:30,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:01:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:01:30,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:31,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:31,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:31,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 90 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775408381] [2020-10-15 00:01:31,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:31,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:01:31,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659217932] [2020-10-15 00:01:31,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:01:31,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:01:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:01:31,236 INFO L87 Difference]: Start difference. First operand 59 states and 83 transitions. Second operand 25 states. [2020-10-15 00:01:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:31,456 INFO L93 Difference]: Finished difference Result 159 states and 231 transitions. [2020-10-15 00:01:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:01:31,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-15 00:01:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:31,457 INFO L225 Difference]: With dead ends: 159 [2020-10-15 00:01:31,457 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 00:01:31,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:01:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 00:01:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 61. [2020-10-15 00:01:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:01:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2020-10-15 00:01:31,468 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 58 [2020-10-15 00:01:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:31,468 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2020-10-15 00:01:31,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:01:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2020-10-15 00:01:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:01:31,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:31,469 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:31,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:01:31,469 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1486045314, now seen corresponding path program 23 times [2020-10-15 00:01:31,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:31,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649244854] [2020-10-15 00:01:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:01:32,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:32,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-15 00:01:32,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:01:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:01:32,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:32,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:32,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:32,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 94 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:32,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649244854] [2020-10-15 00:01:32,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:32,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:01:32,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933063657] [2020-10-15 00:01:32,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:01:32,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:01:32,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:32,582 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand 26 states. [2020-10-15 00:01:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:32,906 INFO L93 Difference]: Finished difference Result 165 states and 240 transitions. [2020-10-15 00:01:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:01:32,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-15 00:01:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:32,907 INFO L225 Difference]: With dead ends: 165 [2020-10-15 00:01:32,907 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 00:01:32,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 00:01:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 63. [2020-10-15 00:01:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:01:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 89 transitions. [2020-10-15 00:01:32,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 89 transitions. Word has length 60 [2020-10-15 00:01:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:32,919 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 89 transitions. [2020-10-15 00:01:32,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:01:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 89 transitions. [2020-10-15 00:01:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:01:32,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:32,920 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:32,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:01:32,921 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1057366791, now seen corresponding path program 24 times [2020-10-15 00:01:32,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:32,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437026923] [2020-10-15 00:01:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:33,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:01:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:01:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:34,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:34,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:34,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:34,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:34,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:34,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 98 proven. 576 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:34,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437026923] [2020-10-15 00:01:34,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:34,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:01:34,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104485149] [2020-10-15 00:01:34,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:01:34,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:01:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:01:34,113 INFO L87 Difference]: Start difference. First operand 63 states and 89 transitions. Second operand 27 states. [2020-10-15 00:01:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:34,561 INFO L93 Difference]: Finished difference Result 171 states and 249 transitions. [2020-10-15 00:01:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:01:34,562 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-15 00:01:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:34,563 INFO L225 Difference]: With dead ends: 171 [2020-10-15 00:01:34,564 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 00:01:34,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:01:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 00:01:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 65. [2020-10-15 00:01:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:01:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2020-10-15 00:01:34,586 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 62 [2020-10-15 00:01:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:34,586 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2020-10-15 00:01:34,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:01:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2020-10-15 00:01:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:01:34,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:34,588 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:34,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:01:34,588 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1414166604, now seen corresponding path program 25 times [2020-10-15 00:01:34,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:34,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768319193] [2020-10-15 00:01:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:01:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:35,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:35,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:35,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:35,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:35,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:35,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:35,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:35,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 102 proven. 625 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:35,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768319193] [2020-10-15 00:01:35,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:35,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:01:35,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740078738] [2020-10-15 00:01:35,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:01:35,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:01:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:01:35,674 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand 28 states. [2020-10-15 00:01:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:36,052 INFO L93 Difference]: Finished difference Result 177 states and 258 transitions. [2020-10-15 00:01:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:01:36,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-15 00:01:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:36,055 INFO L225 Difference]: With dead ends: 177 [2020-10-15 00:01:36,055 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 00:01:36,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:01:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 00:01:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 67. [2020-10-15 00:01:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:01:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2020-10-15 00:01:36,074 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 64 [2020-10-15 00:01:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:36,075 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2020-10-15 00:01:36,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:01:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2020-10-15 00:01:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:01:36,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:36,076 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:36,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:01:36,076 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -701403217, now seen corresponding path program 26 times [2020-10-15 00:01:36,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:36,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261799097] [2020-10-15 00:01:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:36,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:36,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:01:36,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:36,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-15 00:01:36,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:36,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:01:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:01:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:37,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:37,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:37,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 106 proven. 676 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261799097] [2020-10-15 00:01:37,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:37,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:01:37,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733303780] [2020-10-15 00:01:37,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:01:37,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:01:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:01:37,341 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand 29 states. [2020-10-15 00:01:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:37,718 INFO L93 Difference]: Finished difference Result 183 states and 267 transitions. [2020-10-15 00:01:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:01:37,719 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-15 00:01:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:37,720 INFO L225 Difference]: With dead ends: 183 [2020-10-15 00:01:37,720 INFO L226 Difference]: Without dead ends: 178 [2020-10-15 00:01:37,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:01:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-15 00:01:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 69. [2020-10-15 00:01:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:01:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2020-10-15 00:01:37,737 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 66 [2020-10-15 00:01:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:37,738 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2020-10-15 00:01:37,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:01:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2020-10-15 00:01:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:01:37,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:37,739 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:37,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:01:37,739 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1364411626, now seen corresponding path program 27 times [2020-10-15 00:01:37,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:37,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061043020] [2020-10-15 00:01:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:38,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:38,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:01:38,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:38,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-15 00:01:38,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:38,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:01:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:01:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:38,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:38,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:38,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:38,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:38,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:38,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 110 proven. 729 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:38,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061043020] [2020-10-15 00:01:38,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:38,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:01:38,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498819093] [2020-10-15 00:01:38,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:01:38,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:38,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:01:38,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:01:38,963 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand 30 states. [2020-10-15 00:01:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:39,408 INFO L93 Difference]: Finished difference Result 189 states and 276 transitions. [2020-10-15 00:01:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:01:39,409 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-15 00:01:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:39,410 INFO L225 Difference]: With dead ends: 189 [2020-10-15 00:01:39,410 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 00:01:39,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:01:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 00:01:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 71. [2020-10-15 00:01:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:01:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 101 transitions. [2020-10-15 00:01:39,428 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 101 transitions. Word has length 68 [2020-10-15 00:01:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:39,428 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 101 transitions. [2020-10-15 00:01:39,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:01:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 101 transitions. [2020-10-15 00:01:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:01:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:39,429 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:39,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:01:39,429 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1957382299, now seen corresponding path program 28 times [2020-10-15 00:01:39,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:39,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238840846] [2020-10-15 00:01:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:40,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:40,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:01:40,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-15 00:01:40,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:40,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:01:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:40,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:01:40,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:40,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:40,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:40,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:40,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:40,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:40,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:40,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:40,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 114 proven. 784 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:40,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238840846] [2020-10-15 00:01:40,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:40,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:01:40,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961368558] [2020-10-15 00:01:40,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:01:40,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:01:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:01:40,797 INFO L87 Difference]: Start difference. First operand 71 states and 101 transitions. Second operand 31 states. [2020-10-15 00:01:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:41,310 INFO L93 Difference]: Finished difference Result 195 states and 285 transitions. [2020-10-15 00:01:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:01:41,313 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-15 00:01:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:41,315 INFO L225 Difference]: With dead ends: 195 [2020-10-15 00:01:41,315 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 00:01:41,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:01:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 00:01:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 73. [2020-10-15 00:01:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:01:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2020-10-15 00:01:41,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 70 [2020-10-15 00:01:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:41,334 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2020-10-15 00:01:41,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:01:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2020-10-15 00:01:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:01:41,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:41,336 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:41,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:01:41,336 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1254324000, now seen corresponding path program 29 times [2020-10-15 00:01:41,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:41,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927647274] [2020-10-15 00:01:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:41,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:41,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:41,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:41,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:01:41,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-15 00:01:41,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:41,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:41,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:01:41,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:41,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:01:41,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:42,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:42,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:42,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 118 proven. 841 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:42,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927647274] [2020-10-15 00:01:42,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:42,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:01:42,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407969522] [2020-10-15 00:01:42,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:01:42,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:01:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:01:42,375 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand 32 states. [2020-10-15 00:01:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:42,885 INFO L93 Difference]: Finished difference Result 201 states and 294 transitions. [2020-10-15 00:01:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:01:42,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-15 00:01:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:42,893 INFO L225 Difference]: With dead ends: 201 [2020-10-15 00:01:42,893 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 00:01:42,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:01:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 00:01:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 75. [2020-10-15 00:01:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:01:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2020-10-15 00:01:42,914 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 72 [2020-10-15 00:01:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:42,914 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2020-10-15 00:01:42,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:01:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2020-10-15 00:01:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:01:42,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:42,915 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:42,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:01:42,916 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -377408485, now seen corresponding path program 30 times [2020-10-15 00:01:42,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:42,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598120736] [2020-10-15 00:01:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:43,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:01:43,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:01:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:44,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:44,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:44,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:44,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:44,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 122 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:44,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598120736] [2020-10-15 00:01:44,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:44,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:01:44,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675402304] [2020-10-15 00:01:44,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:01:44,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:01:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:01:44,158 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand 33 states. [2020-10-15 00:01:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:44,699 INFO L93 Difference]: Finished difference Result 207 states and 303 transitions. [2020-10-15 00:01:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:01:44,700 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-15 00:01:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:44,701 INFO L225 Difference]: With dead ends: 207 [2020-10-15 00:01:44,701 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 00:01:44,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:01:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 00:01:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 77. [2020-10-15 00:01:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:01:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 110 transitions. [2020-10-15 00:01:44,723 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 110 transitions. Word has length 74 [2020-10-15 00:01:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:44,723 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 110 transitions. [2020-10-15 00:01:44,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:01:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 110 transitions. [2020-10-15 00:01:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:01:44,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:44,724 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:44,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:01:44,725 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash -809263530, now seen corresponding path program 31 times [2020-10-15 00:01:44,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:44,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552787712] [2020-10-15 00:01:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:44,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:44,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:45,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:01:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:46,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:46,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:46,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:46,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:46,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:46,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:46,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 126 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:46,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552787712] [2020-10-15 00:01:46,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:46,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:01:46,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282409422] [2020-10-15 00:01:46,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:01:46,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:01:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:01:46,016 INFO L87 Difference]: Start difference. First operand 77 states and 110 transitions. Second operand 34 states. [2020-10-15 00:01:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:46,605 INFO L93 Difference]: Finished difference Result 213 states and 312 transitions. [2020-10-15 00:01:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:01:46,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-15 00:01:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:46,609 INFO L225 Difference]: With dead ends: 213 [2020-10-15 00:01:46,609 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 00:01:46,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:01:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 00:01:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 79. [2020-10-15 00:01:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:01:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2020-10-15 00:01:46,630 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 76 [2020-10-15 00:01:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:46,630 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2020-10-15 00:01:46,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:01:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2020-10-15 00:01:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:01:46,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:46,632 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:46,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:01:46,632 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 789865937, now seen corresponding path program 32 times [2020-10-15 00:01:46,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:46,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875026229] [2020-10-15 00:01:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:46,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:47,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:47,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:01:47,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:47,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-15 00:01:47,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:47,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:01:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:01:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:47,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:48,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:48,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:48,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:48,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 130 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:48,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875026229] [2020-10-15 00:01:48,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:48,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:01:48,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680801297] [2020-10-15 00:01:48,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:01:48,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:01:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:01:48,009 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand 35 states. [2020-10-15 00:01:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:48,720 INFO L93 Difference]: Finished difference Result 219 states and 321 transitions. [2020-10-15 00:01:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:01:48,720 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-15 00:01:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:48,722 INFO L225 Difference]: With dead ends: 219 [2020-10-15 00:01:48,722 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 00:01:48,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:01:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 00:01:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 81. [2020-10-15 00:01:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:01:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2020-10-15 00:01:48,758 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 78 [2020-10-15 00:01:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:48,759 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2020-10-15 00:01:48,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:01:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2020-10-15 00:01:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:01:48,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:48,760 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:48,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:01:48,760 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -45008244, now seen corresponding path program 33 times [2020-10-15 00:01:48,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:48,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417501685] [2020-10-15 00:01:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:49,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:01:49,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:01:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:50,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:50,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:50,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:50,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:50,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:50,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:50,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 134 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:50,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417501685] [2020-10-15 00:01:50,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:50,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:01:50,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378723023] [2020-10-15 00:01:50,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:01:50,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:50,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:01:50,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:01:50,264 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand 36 states. [2020-10-15 00:01:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:51,034 INFO L93 Difference]: Finished difference Result 225 states and 330 transitions. [2020-10-15 00:01:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:01:51,034 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-15 00:01:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:51,035 INFO L225 Difference]: With dead ends: 225 [2020-10-15 00:01:51,036 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 00:01:51,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:01:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 00:01:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 83. [2020-10-15 00:01:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:01:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2020-10-15 00:01:51,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 80 [2020-10-15 00:01:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:51,058 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2020-10-15 00:01:51,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:01:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2020-10-15 00:01:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:01:51,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:51,059 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:51,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:01:51,060 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:51,060 INFO L82 PathProgramCache]: Analyzing trace with hash 799788167, now seen corresponding path program 34 times [2020-10-15 00:01:51,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:51,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948170451] [2020-10-15 00:01:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:01:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:01:51,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:52,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:52,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:52,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 138 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:52,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948170451] [2020-10-15 00:01:52,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:52,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:01:52,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857638079] [2020-10-15 00:01:52,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:01:52,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:01:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:01:52,555 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand 37 states. [2020-10-15 00:01:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:53,360 INFO L93 Difference]: Finished difference Result 231 states and 339 transitions. [2020-10-15 00:01:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:01:53,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-15 00:01:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:53,362 INFO L225 Difference]: With dead ends: 231 [2020-10-15 00:01:53,363 INFO L226 Difference]: Without dead ends: 226 [2020-10-15 00:01:53,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:01:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-15 00:01:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 85. [2020-10-15 00:01:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:01:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2020-10-15 00:01:53,387 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 82 [2020-10-15 00:01:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:53,388 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2020-10-15 00:01:53,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:01:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2020-10-15 00:01:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:01:53,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:53,389 INFO L422 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:53,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:01:53,389 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:53,390 INFO L82 PathProgramCache]: Analyzing trace with hash 900320194, now seen corresponding path program 35 times [2020-10-15 00:01:53,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:53,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383197143] [2020-10-15 00:01:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:53,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:54,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:01:54,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:01:54,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:55,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:55,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:55,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:55,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:55,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:55,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 142 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:55,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383197143] [2020-10-15 00:01:55,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:55,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:01:55,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383232454] [2020-10-15 00:01:55,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:01:55,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:01:55,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:01:55,146 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand 38 states. [2020-10-15 00:01:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:56,077 INFO L93 Difference]: Finished difference Result 237 states and 348 transitions. [2020-10-15 00:01:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:01:56,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-15 00:01:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:56,079 INFO L225 Difference]: With dead ends: 237 [2020-10-15 00:01:56,079 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 00:01:56,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:01:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 00:01:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 87. [2020-10-15 00:01:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:01:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2020-10-15 00:01:56,104 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 84 [2020-10-15 00:01:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:56,104 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2020-10-15 00:01:56,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:01:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2020-10-15 00:01:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:01:56,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:56,105 INFO L422 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:56,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:01:56,105 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1272649667, now seen corresponding path program 36 times [2020-10-15 00:01:56,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:56,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052414948] [2020-10-15 00:01:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:56,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:01:56,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:56,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-15 00:01:56,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:56,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:56,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:01:56,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:01:56,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:01:56,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:57,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 146 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:01:57,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052414948] [2020-10-15 00:01:57,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:57,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:01:57,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751523394] [2020-10-15 00:01:57,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:01:57,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:57,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:01:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:01:57,729 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand 39 states. [2020-10-15 00:01:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:58,760 INFO L93 Difference]: Finished difference Result 243 states and 357 transitions. [2020-10-15 00:01:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:01:58,760 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-15 00:01:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:58,762 INFO L225 Difference]: With dead ends: 243 [2020-10-15 00:01:58,763 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 00:01:58,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:01:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 00:01:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 89. [2020-10-15 00:01:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:01:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2020-10-15 00:01:58,797 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 86 [2020-10-15 00:01:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:58,798 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2020-10-15 00:01:58,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:01:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2020-10-15 00:01:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:01:58,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:58,799 INFO L422 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:58,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:01:58,799 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2142580232, now seen corresponding path program 37 times [2020-10-15 00:01:58,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:58,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126282089] [2020-10-15 00:01:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:00,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:00,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:02:00,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:00,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:02:00,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:00,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:00,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:00,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:00,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:00,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:00,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 150 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:00,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126282089] [2020-10-15 00:02:00,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:00,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:02:00,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447929591] [2020-10-15 00:02:00,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:02:00,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:00,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:02:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:00,916 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand 40 states. [2020-10-15 00:02:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:02,139 INFO L93 Difference]: Finished difference Result 249 states and 366 transitions. [2020-10-15 00:02:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:02:02,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-15 00:02:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:02,142 INFO L225 Difference]: With dead ends: 249 [2020-10-15 00:02:02,142 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 00:02:02,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 00:02:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 91. [2020-10-15 00:02:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:02:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 131 transitions. [2020-10-15 00:02:02,178 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 131 transitions. Word has length 88 [2020-10-15 00:02:02,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:02,179 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 131 transitions. [2020-10-15 00:02:02,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:02:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2020-10-15 00:02:02,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:02:02,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:02,180 INFO L422 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:02,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:02:02,180 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash -627230477, now seen corresponding path program 38 times [2020-10-15 00:02:02,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:02,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000836800] [2020-10-15 00:02:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:02,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:03,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:02:03,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:03,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-15 00:02:03,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:03,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:02:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:02:03,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:04,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:04,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:04,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:04,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:04,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:04,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 154 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:04,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000836800] [2020-10-15 00:02:04,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:04,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:02:04,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267504952] [2020-10-15 00:02:04,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:02:04,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:02:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:02:04,183 INFO L87 Difference]: Start difference. First operand 91 states and 131 transitions. Second operand 41 states. [2020-10-15 00:02:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:05,519 INFO L93 Difference]: Finished difference Result 255 states and 375 transitions. [2020-10-15 00:02:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:02:05,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-15 00:02:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:05,521 INFO L225 Difference]: With dead ends: 255 [2020-10-15 00:02:05,521 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 00:02:05,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:02:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 00:02:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 93. [2020-10-15 00:02:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:02:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 134 transitions. [2020-10-15 00:02:05,556 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 134 transitions. Word has length 90 [2020-10-15 00:02:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:05,556 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 134 transitions. [2020-10-15 00:02:05,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:02:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 134 transitions. [2020-10-15 00:02:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:02:05,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:05,557 INFO L422 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:05,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:02:05,557 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -370029266, now seen corresponding path program 39 times [2020-10-15 00:02:05,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:05,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128605809] [2020-10-15 00:02:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:05,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:06,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:02:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:02:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:07,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:07,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:07,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:07,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:07,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:07,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:07,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:07,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 158 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:07,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128605809] [2020-10-15 00:02:07,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:07,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:02:07,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995507016] [2020-10-15 00:02:07,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:02:07,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:02:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:07,667 INFO L87 Difference]: Start difference. First operand 93 states and 134 transitions. Second operand 42 states. [2020-10-15 00:02:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:09,124 INFO L93 Difference]: Finished difference Result 261 states and 384 transitions. [2020-10-15 00:02:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:02:09,125 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-15 00:02:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:09,128 INFO L225 Difference]: With dead ends: 261 [2020-10-15 00:02:09,128 INFO L226 Difference]: Without dead ends: 256 [2020-10-15 00:02:09,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-15 00:02:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 95. [2020-10-15 00:02:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:02:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2020-10-15 00:02:09,168 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 92 [2020-10-15 00:02:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:09,169 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2020-10-15 00:02:09,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:02:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2020-10-15 00:02:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:02:09,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:09,170 INFO L422 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:09,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:02:09,170 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1987198633, now seen corresponding path program 40 times [2020-10-15 00:02:09,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:09,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392752110] [2020-10-15 00:02:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:10,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:10,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:02:10,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:02:10,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:11,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:11,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 162 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:11,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392752110] [2020-10-15 00:02:11,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:11,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:02:11,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280212343] [2020-10-15 00:02:11,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:02:11,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:11,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:02:11,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:02:11,772 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand 43 states. [2020-10-15 00:02:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:13,472 INFO L93 Difference]: Finished difference Result 267 states and 393 transitions. [2020-10-15 00:02:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:02:13,473 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-15 00:02:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:13,475 INFO L225 Difference]: With dead ends: 267 [2020-10-15 00:02:13,475 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 00:02:13,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:02:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 00:02:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 97. [2020-10-15 00:02:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:02:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2020-10-15 00:02:13,519 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 94 [2020-10-15 00:02:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:13,519 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2020-10-15 00:02:13,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:02:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2020-10-15 00:02:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:02:13,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:13,520 INFO L422 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:13,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:02:13,521 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash -459522716, now seen corresponding path program 41 times [2020-10-15 00:02:13,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:13,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503681783] [2020-10-15 00:02:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:02:15,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:16,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 166 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:16,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503681783] [2020-10-15 00:02:16,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:16,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:02:16,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499977459] [2020-10-15 00:02:16,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:02:16,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:02:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:02:16,038 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand 44 states. [2020-10-15 00:02:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:17,943 INFO L93 Difference]: Finished difference Result 273 states and 402 transitions. [2020-10-15 00:02:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:02:17,944 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-15 00:02:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:17,945 INFO L225 Difference]: With dead ends: 273 [2020-10-15 00:02:17,946 INFO L226 Difference]: Without dead ends: 268 [2020-10-15 00:02:17,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:02:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-15 00:02:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 99. [2020-10-15 00:02:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 00:02:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 143 transitions. [2020-10-15 00:02:17,988 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 143 transitions. Word has length 96 [2020-10-15 00:02:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:17,989 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 143 transitions. [2020-10-15 00:02:17,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:02:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 143 transitions. [2020-10-15 00:02:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-15 00:02:17,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:17,989 INFO L422 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:17,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:02:17,990 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:17,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1883339103, now seen corresponding path program 42 times [2020-10-15 00:02:17,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:17,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884908136] [2020-10-15 00:02:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-15 00:02:19,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-15 00:02:19,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:20,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:20,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 170 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:20,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884908136] [2020-10-15 00:02:20,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:20,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:02:20,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115253092] [2020-10-15 00:02:20,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:02:20,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:02:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:02:20,448 INFO L87 Difference]: Start difference. First operand 99 states and 143 transitions. Second operand 45 states. [2020-10-15 00:02:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:23,046 INFO L93 Difference]: Finished difference Result 279 states and 411 transitions. [2020-10-15 00:02:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:02:23,046 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-15 00:02:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:23,048 INFO L225 Difference]: With dead ends: 279 [2020-10-15 00:02:23,048 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 00:02:23,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:02:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 00:02:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 101. [2020-10-15 00:02:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:02:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 146 transitions. [2020-10-15 00:02:23,105 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 146 transitions. Word has length 98 [2020-10-15 00:02:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:23,105 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 146 transitions. [2020-10-15 00:02:23,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:02:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 146 transitions. [2020-10-15 00:02:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 00:02:23,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:23,106 INFO L422 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:23,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:02:23,106 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1484283238, now seen corresponding path program 43 times [2020-10-15 00:02:23,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:23,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113024066] [2020-10-15 00:02:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1922 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:02:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-15 00:02:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:26,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:26,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 174 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:26,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113024066] [2020-10-15 00:02:26,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:26,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:02:26,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999919778] [2020-10-15 00:02:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:02:26,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:02:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:02:26,134 INFO L87 Difference]: Start difference. First operand 101 states and 146 transitions. Second operand 46 states. [2020-10-15 00:02:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:28,423 INFO L93 Difference]: Finished difference Result 285 states and 420 transitions. [2020-10-15 00:02:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:02:28,424 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-15 00:02:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:28,425 INFO L225 Difference]: With dead ends: 285 [2020-10-15 00:02:28,425 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 00:02:28,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:02:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 00:02:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 103. [2020-10-15 00:02:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 00:02:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2020-10-15 00:02:28,486 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 100 [2020-10-15 00:02:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:28,486 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2020-10-15 00:02:28,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:02:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2020-10-15 00:02:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 00:02:28,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:28,487 INFO L422 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:28,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:02:28,487 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash 635988245, now seen corresponding path program 44 times [2020-10-15 00:02:28,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:28,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651352409] [2020-10-15 00:02:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 00:02:29,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:29,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-15 00:02:29,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:30,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:30,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:30,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:30,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:30,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:30,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 178 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:31,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651352409] [2020-10-15 00:02:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:02:31,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597447026] [2020-10-15 00:02:31,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:02:31,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:31,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:02:31,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:02:31,010 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand 47 states. [2020-10-15 00:02:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:33,574 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2020-10-15 00:02:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:02:33,574 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-15 00:02:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:33,576 INFO L225 Difference]: With dead ends: 291 [2020-10-15 00:02:33,576 INFO L226 Difference]: Without dead ends: 286 [2020-10-15 00:02:33,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:02:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-15 00:02:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 105. [2020-10-15 00:02:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 00:02:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2020-10-15 00:02:33,641 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 102 [2020-10-15 00:02:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:33,642 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2020-10-15 00:02:33,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:02:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2020-10-15 00:02:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 00:02:33,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:33,643 INFO L422 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:02:33,643 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1892582192, now seen corresponding path program 45 times [2020-10-15 00:02:33,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:33,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713833106] [2020-10-15 00:02:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2897 [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:02:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-15 00:02:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:37,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:37,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:37,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:37,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:37,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:37,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:37,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:37,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:37,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:37,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 182 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:37,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713833106] [2020-10-15 00:02:37,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:37,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:02:37,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860669806] [2020-10-15 00:02:37,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:02:37,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:02:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:02:37,768 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand 48 states. [2020-10-15 00:02:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:40,756 INFO L93 Difference]: Finished difference Result 297 states and 438 transitions. [2020-10-15 00:02:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:02:40,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-15 00:02:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:40,759 INFO L225 Difference]: With dead ends: 297 [2020-10-15 00:02:40,759 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 00:02:40,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:02:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 00:02:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 107. [2020-10-15 00:02:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 00:02:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2020-10-15 00:02:40,832 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 104 [2020-10-15 00:02:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:40,833 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2020-10-15 00:02:40,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:02:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2020-10-15 00:02:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 00:02:40,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:40,833 INFO L422 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:40,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:02:40,834 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash -897282613, now seen corresponding path program 46 times [2020-10-15 00:02:40,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:40,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047893427] [2020-10-15 00:02:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:42,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:42,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-15 00:02:42,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:42,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-15 00:02:42,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 186 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:43,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047893427] [2020-10-15 00:02:43,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:43,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:02:43,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336397885] [2020-10-15 00:02:43,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:02:43,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:43,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:02:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:02:43,672 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand 49 states. [2020-10-15 00:02:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:46,791 INFO L93 Difference]: Finished difference Result 303 states and 447 transitions. [2020-10-15 00:02:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:02:46,792 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-15 00:02:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:46,793 INFO L225 Difference]: With dead ends: 303 [2020-10-15 00:02:46,793 INFO L226 Difference]: Without dead ends: 298 [2020-10-15 00:02:46,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:02:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-15 00:02:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 109. [2020-10-15 00:02:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:02:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 158 transitions. [2020-10-15 00:02:46,861 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 158 transitions. Word has length 106 [2020-10-15 00:02:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:46,862 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 158 transitions. [2020-10-15 00:02:46,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:02:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 158 transitions. [2020-10-15 00:02:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 00:02:46,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:46,863 INFO L422 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:46,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:02:46,863 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2102873094, now seen corresponding path program 47 times [2020-10-15 00:02:46,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:46,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887800188] [2020-10-15 00:02:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:48,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2087 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-15 00:02:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:50,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:50,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:50,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:50,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:50,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:50,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:50,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:50,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 190 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:50,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887800188] [2020-10-15 00:02:50,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:50,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:02:50,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578249610] [2020-10-15 00:02:50,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:02:50,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:02:50,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:02:50,283 INFO L87 Difference]: Start difference. First operand 109 states and 158 transitions. Second operand 50 states. [2020-10-15 00:02:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,730 INFO L93 Difference]: Finished difference Result 309 states and 456 transitions. [2020-10-15 00:02:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:02:53,731 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-15 00:02:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,733 INFO L225 Difference]: With dead ends: 309 [2020-10-15 00:02:53,733 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 00:02:53,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:02:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 00:02:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 111. [2020-10-15 00:02:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 00:02:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2020-10-15 00:02:53,801 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 108 [2020-10-15 00:02:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,802 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2020-10-15 00:02:53,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:02:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2020-10-15 00:02:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-15 00:02:53,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,802 INFO L422 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:02:53,803 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash -965515391, now seen corresponding path program 48 times [2020-10-15 00:02:53,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269834734] [2020-10-15 00:02:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-15 00:02:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:57,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:57,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:57,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:57,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 194 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:57,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269834734] [2020-10-15 00:02:57,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:57,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:02:57,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525422476] [2020-10-15 00:02:57,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:02:57,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:02:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:02:57,066 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand 51 states. [2020-10-15 00:03:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:00,672 INFO L93 Difference]: Finished difference Result 315 states and 465 transitions. [2020-10-15 00:03:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:03:00,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-15 00:03:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:00,675 INFO L225 Difference]: With dead ends: 315 [2020-10-15 00:03:00,676 INFO L226 Difference]: Without dead ends: 310 [2020-10-15 00:03:00,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:03:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-15 00:03:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 113. [2020-10-15 00:03:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 00:03:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 164 transitions. [2020-10-15 00:03:00,751 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 164 transitions. Word has length 110 [2020-10-15 00:03:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:00,752 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 164 transitions. [2020-10-15 00:03:00,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:03:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 164 transitions. [2020-10-15 00:03:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-15 00:03:00,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:00,753 INFO L422 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:00,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:03:00,753 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 955682876, now seen corresponding path program 49 times [2020-10-15 00:03:00,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:00,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372790014] [2020-10-15 00:03:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1690 [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:02,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:03:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-15 00:03:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:03,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 198 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:03,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372790014] [2020-10-15 00:03:03,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:03,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:03:03,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82457619] [2020-10-15 00:03:03,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:03:03,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:03:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:03,844 INFO L87 Difference]: Start difference. First operand 113 states and 164 transitions. Second operand 52 states. [2020-10-15 00:03:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:07,686 INFO L93 Difference]: Finished difference Result 321 states and 474 transitions. [2020-10-15 00:03:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:03:07,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-15 00:03:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:07,689 INFO L225 Difference]: With dead ends: 321 [2020-10-15 00:03:07,689 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 00:03:07,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 00:03:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 115. [2020-10-15 00:03:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 00:03:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 167 transitions. [2020-10-15 00:03:07,772 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 167 transitions. Word has length 112 [2020-10-15 00:03:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:07,773 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 167 transitions. [2020-10-15 00:03:07,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:03:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 167 transitions. [2020-10-15 00:03:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-15 00:03:07,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:07,774 INFO L422 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:07,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:03:07,774 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 391280183, now seen corresponding path program 50 times [2020-10-15 00:03:07,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:07,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174466753] [2020-10-15 00:03:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:07,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:09,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:09,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-15 00:03:09,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:09,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1676 [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-15 00:03:09,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:10,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:10,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:10,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:10,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:10,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:10,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:10,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:10,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 202 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:10,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174466753] [2020-10-15 00:03:10,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:10,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:03:10,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697921608] [2020-10-15 00:03:10,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:03:10,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:10,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:03:10,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:10,968 INFO L87 Difference]: Start difference. First operand 115 states and 167 transitions. Second operand 53 states. [2020-10-15 00:03:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:15,026 INFO L93 Difference]: Finished difference Result 327 states and 483 transitions. [2020-10-15 00:03:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:03:15,027 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-15 00:03:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:15,029 INFO L225 Difference]: With dead ends: 327 [2020-10-15 00:03:15,029 INFO L226 Difference]: Without dead ends: 322 [2020-10-15 00:03:15,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-15 00:03:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 117. [2020-10-15 00:03:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 00:03:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 170 transitions. [2020-10-15 00:03:15,109 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 170 transitions. Word has length 114 [2020-10-15 00:03:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:15,110 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 170 transitions. [2020-10-15 00:03:15,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:03:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 170 transitions. [2020-10-15 00:03:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-15 00:03:15,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:15,111 INFO L422 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:15,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:03:15,111 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash -833828494, now seen corresponding path program 51 times [2020-10-15 00:03:15,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:15,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932887301] [2020-10-15 00:03:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:15,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:17,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2300 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:03:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-15 00:03:17,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:18,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:18,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:18,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:18,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 206 proven. 2601 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:18,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932887301] [2020-10-15 00:03:18,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:18,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:03:18,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199649564] [2020-10-15 00:03:18,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:03:18,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:03:18,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:18,990 INFO L87 Difference]: Start difference. First operand 117 states and 170 transitions. Second operand 54 states. [2020-10-15 00:03:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:23,406 INFO L93 Difference]: Finished difference Result 333 states and 492 transitions. [2020-10-15 00:03:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:03:23,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-15 00:03:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:23,409 INFO L225 Difference]: With dead ends: 333 [2020-10-15 00:03:23,409 INFO L226 Difference]: Without dead ends: 328 [2020-10-15 00:03:23,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-15 00:03:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 119. [2020-10-15 00:03:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:03:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 173 transitions. [2020-10-15 00:03:23,522 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 173 transitions. Word has length 116 [2020-10-15 00:03:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:23,522 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 173 transitions. [2020-10-15 00:03:23,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:03:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 173 transitions. [2020-10-15 00:03:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-15 00:03:23,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:23,523 INFO L422 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:23,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:03:23,523 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1342227987, now seen corresponding path program 52 times [2020-10-15 00:03:23,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:23,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620464125] [2020-10-15 00:03:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:25,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:25,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-15 00:03:25,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-15 00:03:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:26,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 210 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:26,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620464125] [2020-10-15 00:03:26,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:26,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:03:26,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845861447] [2020-10-15 00:03:26,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:03:26,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:03:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:03:26,930 INFO L87 Difference]: Start difference. First operand 119 states and 173 transitions. Second operand 55 states. [2020-10-15 00:03:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:31,767 INFO L93 Difference]: Finished difference Result 339 states and 501 transitions. [2020-10-15 00:03:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:03:31,767 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-15 00:03:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:31,769 INFO L225 Difference]: With dead ends: 339 [2020-10-15 00:03:31,769 INFO L226 Difference]: Without dead ends: 334 [2020-10-15 00:03:31,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:03:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-15 00:03:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 121. [2020-10-15 00:03:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 00:03:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 176 transitions. [2020-10-15 00:03:31,941 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 176 transitions. Word has length 118 [2020-10-15 00:03:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:31,942 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 176 transitions. [2020-10-15 00:03:31,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:03:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 176 transitions. [2020-10-15 00:03:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-15 00:03:31,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:31,943 INFO L422 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:31,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:03:31,945 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash -287869016, now seen corresponding path program 53 times [2020-10-15 00:03:31,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:31,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637871109] [2020-10-15 00:03:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3089 [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-15 00:03:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:36,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:36,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 214 proven. 2809 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637871109] [2020-10-15 00:03:36,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:36,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:03:36,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121061539] [2020-10-15 00:03:36,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:03:36,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:03:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:36,655 INFO L87 Difference]: Start difference. First operand 121 states and 176 transitions. Second operand 56 states. [2020-10-15 00:03:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:41,901 INFO L93 Difference]: Finished difference Result 345 states and 510 transitions. [2020-10-15 00:03:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:03:41,902 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-15 00:03:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:41,904 INFO L225 Difference]: With dead ends: 345 [2020-10-15 00:03:41,904 INFO L226 Difference]: Without dead ends: 340 [2020-10-15 00:03:41,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-15 00:03:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 123. [2020-10-15 00:03:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 00:03:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 179 transitions. [2020-10-15 00:03:42,033 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 179 transitions. Word has length 120 [2020-10-15 00:03:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:42,033 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 179 transitions. [2020-10-15 00:03:42,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:03:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 179 transitions. [2020-10-15 00:03:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-15 00:03:42,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:42,034 INFO L422 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:42,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:03:42,034 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash -661179741, now seen corresponding path program 54 times [2020-10-15 00:03:42,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:42,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109511411] [2020-10-15 00:03:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:42,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:44,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-15 00:03:44,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:46,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:46,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 218 proven. 2916 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:46,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109511411] [2020-10-15 00:03:46,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:46,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:03:46,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761965991] [2020-10-15 00:03:46,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:03:46,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:03:46,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:46,032 INFO L87 Difference]: Start difference. First operand 123 states and 179 transitions. Second operand 57 states. [2020-10-15 00:03:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:51,919 INFO L93 Difference]: Finished difference Result 351 states and 519 transitions. [2020-10-15 00:03:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:03:51,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-15 00:03:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:51,922 INFO L225 Difference]: With dead ends: 351 [2020-10-15 00:03:51,922 INFO L226 Difference]: Without dead ends: 346 [2020-10-15 00:03:51,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-15 00:03:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 125. [2020-10-15 00:03:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 00:03:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2020-10-15 00:03:52,036 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 122 [2020-10-15 00:03:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:52,037 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2020-10-15 00:03:52,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:03:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2020-10-15 00:03:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-15 00:03:52,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:52,038 INFO L422 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:52,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:03:52,038 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1364466398, now seen corresponding path program 55 times [2020-10-15 00:03:52,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:52,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717782360] [2020-10-15 00:03:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:52,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:54,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2662 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-15 00:03:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:56,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:56,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:56,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:56,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:56,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:56,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 222 proven. 3025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:03:56,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717782360] [2020-10-15 00:03:56,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:56,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:03:56,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526930687] [2020-10-15 00:03:56,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:03:56,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:56,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:03:56,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:56,437 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand 58 states. [2020-10-15 00:04:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:03,081 INFO L93 Difference]: Finished difference Result 357 states and 528 transitions. [2020-10-15 00:04:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:04:03,082 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-15 00:04:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:03,083 INFO L225 Difference]: With dead ends: 357 [2020-10-15 00:04:03,083 INFO L226 Difference]: Without dead ends: 352 [2020-10-15 00:04:03,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:04:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-15 00:04:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 127. [2020-10-15 00:04:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-15 00:04:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 185 transitions. [2020-10-15 00:04:03,197 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 185 transitions. Word has length 124 [2020-10-15 00:04:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:03,197 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 185 transitions. [2020-10-15 00:04:03,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:04:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 185 transitions. [2020-10-15 00:04:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-15 00:04:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:03,198 INFO L422 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:03,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:04:03,199 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1904746407, now seen corresponding path program 56 times [2020-10-15 00:04:03,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:03,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124238818] [2020-10-15 00:04:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:03,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:03,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:05,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-15 00:04:05,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2497 [2020-10-15 00:04:05,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:05,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:04:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:04:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-15 00:04:05,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:07,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:07,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:07,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:07,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 226 proven. 3136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:04:07,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124238818] [2020-10-15 00:04:07,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:07,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:04:07,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929127476] [2020-10-15 00:04:07,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:04:07,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:07,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:04:07,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:04:07,519 INFO L87 Difference]: Start difference. First operand 127 states and 185 transitions. Second operand 59 states. [2020-10-15 00:04:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:14,354 INFO L93 Difference]: Finished difference Result 363 states and 537 transitions. [2020-10-15 00:04:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:04:14,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-15 00:04:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:14,356 INFO L225 Difference]: With dead ends: 363 [2020-10-15 00:04:14,356 INFO L226 Difference]: Without dead ends: 358 [2020-10-15 00:04:14,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:04:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-15 00:04:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 129. [2020-10-15 00:04:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 00:04:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 188 transitions. [2020-10-15 00:04:14,475 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 188 transitions. Word has length 126 [2020-10-15 00:04:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:14,476 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 188 transitions. [2020-10-15 00:04:14,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:04:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 188 transitions. [2020-10-15 00:04:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-15 00:04:14,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:14,477 INFO L422 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:14,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:04:14,477 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 297808660, now seen corresponding path program 57 times [2020-10-15 00:04:14,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:14,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707111432] [2020-10-15 00:04:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:14,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:16,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:16,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-15 00:04:16,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2439 [2020-10-15 00:04:16,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:16,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:04:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:04:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-15 00:04:16,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:18,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:18,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:18,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:18,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:18,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:18,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 230 proven. 3249 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:04:18,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707111432] [2020-10-15 00:04:18,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:18,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:04:18,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273475310] [2020-10-15 00:04:18,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:04:18,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:04:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:18,802 INFO L87 Difference]: Start difference. First operand 129 states and 188 transitions. Second operand 60 states. [2020-10-15 00:04:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:26,095 INFO L93 Difference]: Finished difference Result 369 states and 546 transitions. [2020-10-15 00:04:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:04:26,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-15 00:04:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:26,098 INFO L225 Difference]: With dead ends: 369 [2020-10-15 00:04:26,098 INFO L226 Difference]: Without dead ends: 364 [2020-10-15 00:04:26,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-15 00:04:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 131. [2020-10-15 00:04:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-15 00:04:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 191 transitions. [2020-10-15 00:04:26,329 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 191 transitions. Word has length 128 [2020-10-15 00:04:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:26,330 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 191 transitions. [2020-10-15 00:04:26,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:04:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 191 transitions. [2020-10-15 00:04:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-15 00:04:26,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:26,331 INFO L422 BasicCegarLoop]: trace histogram [60, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:26,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:04:26,331 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash -465648881, now seen corresponding path program 58 times [2020-10-15 00:04:26,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:26,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031637037] [2020-10-15 00:04:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:29,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:04:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:04:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-15 00:04:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:31,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:31,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 234 proven. 3364 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:04:31,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031637037] [2020-10-15 00:04:31,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:31,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-15 00:04:31,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662205685] [2020-10-15 00:04:31,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-15 00:04:31,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-15 00:04:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:31,069 INFO L87 Difference]: Start difference. First operand 131 states and 191 transitions. Second operand 61 states. [2020-10-15 00:04:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:38,881 INFO L93 Difference]: Finished difference Result 375 states and 555 transitions. [2020-10-15 00:04:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-15 00:04:38,881 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-15 00:04:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:38,884 INFO L225 Difference]: With dead ends: 375 [2020-10-15 00:04:38,884 INFO L226 Difference]: Without dead ends: 370 [2020-10-15 00:04:38,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-15 00:04:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 133. [2020-10-15 00:04:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 00:04:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2020-10-15 00:04:39,015 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 130 [2020-10-15 00:04:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:39,016 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2020-10-15 00:04:39,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-15 00:04:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2020-10-15 00:04:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-15 00:04:39,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:39,016 INFO L422 BasicCegarLoop]: trace histogram [61, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:39,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-15 00:04:39,017 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 291061834, now seen corresponding path program 59 times [2020-10-15 00:04:39,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:39,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99577703] [2020-10-15 00:04:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:39,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:39,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:40,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:41,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2420 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-15 00:04:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:43,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:43,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 238 proven. 3481 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:04:43,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99577703] [2020-10-15 00:04:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:43,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:04:43,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239788681] [2020-10-15 00:04:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:04:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:04:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:43,430 INFO L87 Difference]: Start difference. First operand 133 states and 194 transitions. Second operand 62 states. [2020-10-15 00:04:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:51,916 INFO L93 Difference]: Finished difference Result 381 states and 564 transitions. [2020-10-15 00:04:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:04:51,917 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-15 00:04:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:51,919 INFO L225 Difference]: With dead ends: 381 [2020-10-15 00:04:51,919 INFO L226 Difference]: Without dead ends: 376 [2020-10-15 00:04:51,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-15 00:04:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 135. [2020-10-15 00:04:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 00:04:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 197 transitions. [2020-10-15 00:04:52,091 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 197 transitions. Word has length 132 [2020-10-15 00:04:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:52,091 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 197 transitions. [2020-10-15 00:04:52,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:04:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 197 transitions. [2020-10-15 00:04:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-15 00:04:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:52,092 INFO L422 BasicCegarLoop]: trace histogram [62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:52,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-15 00:04:52,092 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1640585925, now seen corresponding path program 60 times [2020-10-15 00:04:52,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:52,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028233372] [2020-10-15 00:04:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:52,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:55,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:55,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-15 00:04:55,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:55,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3127 [2020-10-15 00:04:55,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:55,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:55,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-15 00:04:55,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:04:55,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-15 00:04:55,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:57,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 242 proven. 3600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:04:57,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028233372] [2020-10-15 00:04:57,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:57,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-15 00:04:57,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384339264] [2020-10-15 00:04:57,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 00:04:57,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:57,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 00:04:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:04:57,416 INFO L87 Difference]: Start difference. First operand 135 states and 197 transitions. Second operand 63 states. [2020-10-15 00:05:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:06,931 INFO L93 Difference]: Finished difference Result 387 states and 573 transitions. [2020-10-15 00:05:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-15 00:05:06,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-15 00:05:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:06,933 INFO L225 Difference]: With dead ends: 387 [2020-10-15 00:05:06,933 INFO L226 Difference]: Without dead ends: 382 [2020-10-15 00:05:06,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:05:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-15 00:05:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 137. [2020-10-15 00:05:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 00:05:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 200 transitions. [2020-10-15 00:05:07,102 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 200 transitions. Word has length 134 [2020-10-15 00:05:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:07,102 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 200 transitions. [2020-10-15 00:05:07,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 00:05:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 200 transitions. [2020-10-15 00:05:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-15 00:05:07,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:07,103 INFO L422 BasicCegarLoop]: trace histogram [63, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:07,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-15 00:05:07,103 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1453113984, now seen corresponding path program 61 times [2020-10-15 00:05:07,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:07,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614286853] [2020-10-15 00:05:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:08,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:09,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:09,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-15 00:05:09,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:05:09,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2726 [2020-10-15 00:05:09,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:09,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:09,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-15 00:05:09,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:09,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-15 00:05:09,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:12,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:12,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:12,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:12,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:12,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:12,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:12,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 246 proven. 3721 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:05:12,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614286853] [2020-10-15 00:05:12,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:12,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-15 00:05:12,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092780292] [2020-10-15 00:05:12,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-15 00:05:12,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-15 00:05:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:05:12,121 INFO L87 Difference]: Start difference. First operand 137 states and 200 transitions. Second operand 64 states.