/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:16:03,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:16:03,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:16:03,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:16:03,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:16:03,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:16:03,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:16:03,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:16:03,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:16:03,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:16:03,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:16:03,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:16:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:16:03,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:16:03,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:16:03,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:16:03,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:16:03,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:16:03,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:16:03,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:16:03,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:16:03,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:16:03,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:16:03,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:16:03,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:16:03,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:16:03,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:16:03,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:16:03,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:16:03,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:16:03,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:16:03,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:16:03,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:16:03,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:16:03,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:16:03,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:16:03,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:16:03,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:16:03,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:16:03,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:16:03,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:16:03,232 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 [2020-10-12 10:16:03,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:16:03,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:16:03,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:16:03,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:16:03,275 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:16:03,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:16:03,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:16:03,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:16:03,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:16:03,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:16:03,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:16:03,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:16:03,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:16:03,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:16:03,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:16:03,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:16:03,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:16:03,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:16:03,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:16:03,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:16:03,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:16:03,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:16:03,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:16:03,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:16:03,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:16:03,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:16:03,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:16:03,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:16:03,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:16:03,281 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:16:03,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:16:03,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:16:03,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:16:03,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:16:03,590 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:16:03,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-12 10:16:03,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b566ea4/c69656e889e546b48fb4667c76fee5b4/FLAGb82b95bd5 [2020-10-12 10:16:04,082 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:16:04,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-12 10:16:04,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b566ea4/c69656e889e546b48fb4667c76fee5b4/FLAGb82b95bd5 [2020-10-12 10:16:04,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b566ea4/c69656e889e546b48fb4667c76fee5b4 [2020-10-12 10:16:04,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:16:04,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:16:04,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:04,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:16:04,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:16:04,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff28928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04, skipping insertion in model container [2020-10-12 10:16:04,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:16:04,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:16:04,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:04,688 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:16:04,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:04,719 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:16:04,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04 WrapperNode [2020-10-12 10:16:04,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:04,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:16:04,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:16:04,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:16:04,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (1/1) ... [2020-10-12 10:16:04,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:16:04,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:16:04,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:16:04,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:16:04,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (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 [2020-10-12 10:16:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:16:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:16:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:16:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:16:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:16:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:16:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:16:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:16:05,095 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:16:05,095 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:16:05,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:05 BoogieIcfgContainer [2020-10-12 10:16:05,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:16:05,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:16:05,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:16:05,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:16:05,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:16:04" (1/3) ... [2020-10-12 10:16:05,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995ee31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:05, skipping insertion in model container [2020-10-12 10:16:05,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:04" (2/3) ... [2020-10-12 10:16:05,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995ee31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:05, skipping insertion in model container [2020-10-12 10:16:05,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:05" (3/3) ... [2020-10-12 10:16:05,107 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2020-10-12 10:16:05,120 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:16:05,127 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:16:05,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:16:05,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:16:05,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:16:05,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:16:05,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:16:05,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:16:05,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:16:05,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:16:05,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:16:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 10:16:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:16:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:05,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:05,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2020-10-12 10:16:05,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:05,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80110662] [2020-10-12 10:16:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:05,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:16:05,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:05,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 10:16:05,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:16:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:05,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:16:05,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:05,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:05,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:05,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:16:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:05,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:05,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80110662] [2020-10-12 10:16:05,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:05,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:16:05,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707536877] [2020-10-12 10:16:05,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:16:05,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:16:05,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:05,528 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-12 10:16:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:05,608 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-12 10:16:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:16:05,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-12 10:16:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:05,619 INFO L225 Difference]: With dead ends: 42 [2020-10-12 10:16:05,619 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 10:16:05,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 10:16:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 10:16:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 10:16:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-12 10:16:05,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-10-12 10:16:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:05,654 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-12 10:16:05,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:16:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-12 10:16:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:16:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:05,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:05,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:16:05,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2020-10-12 10:16:05,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:05,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415046190] [2020-10-12 10:16:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:05,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:16:05,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:05,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 10:16:05,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:05,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:05,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:05,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:05,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:16:05,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:05,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:05,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415046190] [2020-10-12 10:16:05,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:05,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:16:05,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81493607] [2020-10-12 10:16:05,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:16:05,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:05,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:16:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:05,806 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-12 10:16:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:05,875 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-12 10:16:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:16:05,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 10:16:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:05,878 INFO L225 Difference]: With dead ends: 39 [2020-10-12 10:16:05,878 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 10:16:05,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 10:16:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-12 10:16:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 10:16:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 10:16:05,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2020-10-12 10:16:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:05,890 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 10:16:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:16:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 10:16:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:16:05,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:05,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:05,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:16:05,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2020-10-12 10:16:05,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:05,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948203332] [2020-10-12 10:16:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:16:06,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 10:16:06,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:16:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:16:06,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:06,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:06,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948203332] [2020-10-12 10:16:06,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:06,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:16:06,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802705612] [2020-10-12 10:16:06,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:16:06,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:16:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:16:06,361 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-10-12 10:16:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:06,574 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-12 10:16:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:16:06,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-12 10:16:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:06,576 INFO L225 Difference]: With dead ends: 38 [2020-10-12 10:16:06,576 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 10:16:06,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:16:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 10:16:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-12 10:16:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:16:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 10:16:06,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2020-10-12 10:16:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:06,588 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 10:16:06,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:16:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 10:16:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:16:06,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:06,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:06,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:16:06,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash -714399150, now seen corresponding path program 1 times [2020-10-12 10:16:06,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:06,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291037779] [2020-10-12 10:16:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:16:06,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 10:16:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:16:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:16:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:06,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:06,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:06,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 10:16:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:06,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:06,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291037779] [2020-10-12 10:16:06,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:06,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 10:16:06,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529618630] [2020-10-12 10:16:06,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:16:06,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:16:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:06,695 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-12 10:16:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:06,773 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-12 10:16:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:16:06,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-12 10:16:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:06,774 INFO L225 Difference]: With dead ends: 58 [2020-10-12 10:16:06,775 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 10:16:06,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 10:16:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-12 10:16:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:16:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-12 10:16:06,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 24 [2020-10-12 10:16:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:06,784 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-12 10:16:06,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:16:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-12 10:16:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:16:06,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:06,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:06,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:16:06,786 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1639477172, now seen corresponding path program 2 times [2020-10-12 10:16:06,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:06,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976505836] [2020-10-12 10:16:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:06,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:06,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:06,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:06,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:06,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:16:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:06,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:06,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:06,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:06,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:06,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:06,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976505836] [2020-10-12 10:16:06,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:06,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:16:06,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373076850] [2020-10-12 10:16:06,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:16:06,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:16:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:16:06,921 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-10-12 10:16:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,017 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-12 10:16:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:16:07,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 10:16:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,018 INFO L225 Difference]: With dead ends: 70 [2020-10-12 10:16:07,018 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:16:07,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:16:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:16:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-12 10:16:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:16:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-12 10:16:07,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2020-10-12 10:16:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,030 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-12 10:16:07,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:16:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-12 10:16:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:16:07,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:16:07,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash 266857622, now seen corresponding path program 3 times [2020-10-12 10:16:07,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053222276] [2020-10-12 10:16:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:16:07,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-12 10:16:07,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:16:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:16:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:07,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:16:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:07,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:07,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053222276] [2020-10-12 10:16:07,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 10:16:07,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874111663] [2020-10-12 10:16:07,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:16:07,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:16:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:16:07,202 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2020-10-12 10:16:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,325 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-12 10:16:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:16:07,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-12 10:16:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,326 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:16:07,327 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 10:16:07,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:16:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 10:16:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-12 10:16:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:16:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-12 10:16:07,336 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 28 [2020-10-12 10:16:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,336 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-12 10:16:07,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:16:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-12 10:16:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:16:07,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:16:07,338 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -265570056, now seen corresponding path program 4 times [2020-10-12 10:16:07,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929290596] [2020-10-12 10:16:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:16:07,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 10:16:07,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:16:07,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:07,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:16:07,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:07,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:16:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:07,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929290596] [2020-10-12 10:16:07,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:16:07,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172026430] [2020-10-12 10:16:07,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:16:07,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:16:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:07,491 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 8 states. [2020-10-12 10:16:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,617 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-12 10:16:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:16:07,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 10:16:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,619 INFO L225 Difference]: With dead ends: 94 [2020-10-12 10:16:07,619 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:16:07,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:16:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-12 10:16:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:16:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-12 10:16:07,627 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 30 [2020-10-12 10:16:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,628 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-12 10:16:07,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:16:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-12 10:16:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:16:07,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:16:07,630 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -827460390, now seen corresponding path program 5 times [2020-10-12 10:16:07,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837239391] [2020-10-12 10:16:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:16:07,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-12 10:16:07,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:16:07,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:07,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:16:07,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 10:16:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:07,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837239391] [2020-10-12 10:16:07,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:16:07,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14478215] [2020-10-12 10:16:07,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:16:07,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:16:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:16:07,846 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 9 states. [2020-10-12 10:16:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,982 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-12 10:16:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:16:07,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-12 10:16:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,983 INFO L225 Difference]: With dead ends: 106 [2020-10-12 10:16:07,983 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:16:07,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:16:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:16:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-12 10:16:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 10:16:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-12 10:16:07,993 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 32 [2020-10-12 10:16:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,993 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-12 10:16:07,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:16:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-12 10:16:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:16:07,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,994 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:16:07,995 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 361807932, now seen corresponding path program 6 times [2020-10-12 10:16:07,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207516082] [2020-10-12 10:16:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:16:08,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 10:16:08,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:16:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:16:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:08,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:08,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:08,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 10:16:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:08,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:08,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:08,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:08,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207516082] [2020-10-12 10:16:08,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:08,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:16:08,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169740403] [2020-10-12 10:16:08,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:16:08,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:16:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:08,188 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2020-10-12 10:16:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:08,331 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2020-10-12 10:16:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:16:08,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-12 10:16:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:08,332 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:16:08,332 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 10:16:08,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 10:16:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-12 10:16:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 10:16:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-12 10:16:08,341 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 34 [2020-10-12 10:16:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:08,342 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-12 10:16:08,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:16:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-12 10:16:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:16:08,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:08,343 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:08,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:16:08,343 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash 787364638, now seen corresponding path program 7 times [2020-10-12 10:16:08,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:08,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887386585] [2020-10-12 10:16:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:16:08,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 10:16:08,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:16:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:16:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:08,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:08,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:08,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:16:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:08,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887386585] [2020-10-12 10:16:08,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:08,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:16:08,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736361035] [2020-10-12 10:16:08,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:16:08,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:08,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:16:08,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:08,591 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 11 states. [2020-10-12 10:16:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:08,803 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-12 10:16:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:16:08,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-12 10:16:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:08,805 INFO L225 Difference]: With dead ends: 130 [2020-10-12 10:16:08,805 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 10:16:08,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 10:16:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-12 10:16:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:16:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-12 10:16:08,815 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 36 [2020-10-12 10:16:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:08,815 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-12 10:16:08,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:16:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-12 10:16:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:16:08,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:08,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:08,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:16:08,816 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1725465984, now seen corresponding path program 8 times [2020-10-12 10:16:08,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:08,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47063306] [2020-10-12 10:16:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:16:09,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 10:16:09,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:16:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:16:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:09,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:09,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:09,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:16:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:09,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:09,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:09,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47063306] [2020-10-12 10:16:09,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:09,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:16:09,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523195007] [2020-10-12 10:16:09,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:16:09,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:16:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:16:09,123 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 12 states. [2020-10-12 10:16:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,302 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-12 10:16:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:16:09,302 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-12 10:16:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,304 INFO L225 Difference]: With dead ends: 142 [2020-10-12 10:16:09,304 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:16:09,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:16:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:16:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-12 10:16:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 10:16:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-12 10:16:09,312 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 38 [2020-10-12 10:16:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,313 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-12 10:16:09,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:16:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-12 10:16:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:16:09,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,314 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:16:09,315 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1297727330, now seen corresponding path program 9 times [2020-10-12 10:16:09,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899603214] [2020-10-12 10:16:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:16:09,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-12 10:16:09,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:16:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:16:09,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:09,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:09,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:16:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899603214] [2020-10-12 10:16:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:09,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:16:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819508534] [2020-10-12 10:16:09,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:16:09,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:16:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:09,640 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 13 states. [2020-10-12 10:16:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,868 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-10-12 10:16:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:16:09,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 10:16:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,869 INFO L225 Difference]: With dead ends: 154 [2020-10-12 10:16:09,869 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:16:09,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:16:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-12 10:16:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 10:16:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-12 10:16:09,878 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 40 [2020-10-12 10:16:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,878 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-12 10:16:09,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:16:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-12 10:16:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:16:09,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,879 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:16:09,880 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1737226044, now seen corresponding path program 10 times [2020-10-12 10:16:09,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782492387] [2020-10-12 10:16:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:16:10,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-12 10:16:10,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:16:10,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:10,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:16:10,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:10,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:10,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:10,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:10,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:10,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 10:16:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:10,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:10,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:10,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:10,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:10,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782492387] [2020-10-12 10:16:10,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:10,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:16:10,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100484835] [2020-10-12 10:16:10,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:16:10,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:16:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:16:10,304 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 14 states. [2020-10-12 10:16:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:10,593 INFO L93 Difference]: Finished difference Result 166 states and 190 transitions. [2020-10-12 10:16:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:16:10,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 10:16:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:10,595 INFO L225 Difference]: With dead ends: 166 [2020-10-12 10:16:10,595 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 10:16:10,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:16:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 10:16:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-10-12 10:16:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 10:16:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-10-12 10:16:10,603 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 42 [2020-10-12 10:16:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:10,603 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-10-12 10:16:10,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:16:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-10-12 10:16:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:16:10,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:10,605 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:10,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:16:10,605 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2044624474, now seen corresponding path program 11 times [2020-10-12 10:16:10,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:10,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878031850] [2020-10-12 10:16:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:16:10,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-12 10:16:10,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:16:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:16:10,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:11,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:11,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:11,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:11,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 10:16:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:11,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:11,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:11,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:11,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:11,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:11,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878031850] [2020-10-12 10:16:11,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:11,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:16:11,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274212820] [2020-10-12 10:16:11,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:16:11,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:16:11,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:16:11,031 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 15 states. [2020-10-12 10:16:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:11,274 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2020-10-12 10:16:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:16:11,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 10:16:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:11,276 INFO L225 Difference]: With dead ends: 178 [2020-10-12 10:16:11,276 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 10:16:11,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:16:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 10:16:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-12 10:16:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 10:16:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2020-10-12 10:16:11,284 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 44 [2020-10-12 10:16:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:11,284 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2020-10-12 10:16:11,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:16:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2020-10-12 10:16:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:16:11,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:11,285 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:11,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:16:11,286 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1101772280, now seen corresponding path program 12 times [2020-10-12 10:16:11,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:11,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478927318] [2020-10-12 10:16:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:16:11,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-12 10:16:11,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:16:11,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:11,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:16:11,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:11,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:11,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:16:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:11,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:11,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:11,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:11,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478927318] [2020-10-12 10:16:11,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:11,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:16:11,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692277650] [2020-10-12 10:16:11,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:16:11,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:11,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:16:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:16:11,708 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand 16 states. [2020-10-12 10:16:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:12,024 INFO L93 Difference]: Finished difference Result 190 states and 218 transitions. [2020-10-12 10:16:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:16:12,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-12 10:16:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:12,026 INFO L225 Difference]: With dead ends: 190 [2020-10-12 10:16:12,026 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 10:16:12,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:16:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 10:16:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-12 10:16:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 10:16:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-10-12 10:16:12,033 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 46 [2020-10-12 10:16:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:12,034 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-10-12 10:16:12,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:16:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-10-12 10:16:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:16:12,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:12,035 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:12,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:16:12,035 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1258913302, now seen corresponding path program 13 times [2020-10-12 10:16:12,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:12,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818850078] [2020-10-12 10:16:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:12,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:16:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:12,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:12,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:12,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:12,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:12,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:12,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:12,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:16:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:12,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:12,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:12,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:12,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:12,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:12,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818850078] [2020-10-12 10:16:12,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:12,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:16:12,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067672855] [2020-10-12 10:16:12,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:16:12,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:12,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:16:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:16:12,472 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 17 states. [2020-10-12 10:16:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:12,761 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2020-10-12 10:16:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:16:12,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-12 10:16:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:12,763 INFO L225 Difference]: With dead ends: 202 [2020-10-12 10:16:12,763 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:16:12,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:16:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:16:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-12 10:16:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 10:16:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-12 10:16:12,770 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 48 [2020-10-12 10:16:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:12,771 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-12 10:16:12,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:16:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-12 10:16:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:16:12,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:12,772 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:12,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:16:12,772 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1947580084, now seen corresponding path program 14 times [2020-10-12 10:16:12,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:12,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214414781] [2020-10-12 10:16:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:16:13,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:16:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:13,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:13,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:13,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:13,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:13,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:13,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 10:16:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:13,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:13,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:13,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214414781] [2020-10-12 10:16:13,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:13,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:16:13,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658323443] [2020-10-12 10:16:13,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:16:13,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:16:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:16:13,205 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 18 states. [2020-10-12 10:16:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:13,499 INFO L93 Difference]: Finished difference Result 214 states and 246 transitions. [2020-10-12 10:16:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:16:13,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-12 10:16:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:13,501 INFO L225 Difference]: With dead ends: 214 [2020-10-12 10:16:13,501 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 10:16:13,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:16:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 10:16:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-12 10:16:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 10:16:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-12 10:16:13,508 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 50 [2020-10-12 10:16:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:13,509 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-12 10:16:13,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:16:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-12 10:16:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:16:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:13,510 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:13,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:16:13,510 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1963573294, now seen corresponding path program 15 times [2020-10-12 10:16:13,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:13,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831328282] [2020-10-12 10:16:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:13,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:16:13,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-12 10:16:13,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:16:13,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:13,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:16:13,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:13,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:13,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:13,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:13,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:13,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:16:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:13,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:13,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:13,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831328282] [2020-10-12 10:16:13,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:13,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:16:13,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883641005] [2020-10-12 10:16:13,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:16:13,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:16:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:16:13,995 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 19 states. [2020-10-12 10:16:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:14,316 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2020-10-12 10:16:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:16:14,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-12 10:16:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:14,318 INFO L225 Difference]: With dead ends: 226 [2020-10-12 10:16:14,318 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:16:14,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:16:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:16:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-12 10:16:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 10:16:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2020-10-12 10:16:14,326 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 52 [2020-10-12 10:16:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:14,327 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2020-10-12 10:16:14,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:16:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2020-10-12 10:16:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:16:14,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:14,328 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:14,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:16:14,328 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1809381744, now seen corresponding path program 16 times [2020-10-12 10:16:14,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:14,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957249168] [2020-10-12 10:16:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:16:14,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:14,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:16:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:14,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957249168] [2020-10-12 10:16:14,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:14,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:16:14,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397310394] [2020-10-12 10:16:14,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:16:14,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:16:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:16:14,846 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand 20 states. [2020-10-12 10:16:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:15,146 INFO L93 Difference]: Finished difference Result 238 states and 274 transitions. [2020-10-12 10:16:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:16:15,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-12 10:16:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:15,148 INFO L225 Difference]: With dead ends: 238 [2020-10-12 10:16:15,148 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 10:16:15,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:16:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 10:16:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-12 10:16:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 10:16:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2020-10-12 10:16:15,159 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 54 [2020-10-12 10:16:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:15,159 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2020-10-12 10:16:15,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:16:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2020-10-12 10:16:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:16:15,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:15,160 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:15,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:16:15,161 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1628191858, now seen corresponding path program 17 times [2020-10-12 10:16:15,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:15,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367515000] [2020-10-12 10:16:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:15,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:15,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:16:15,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:15,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 10:16:15,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:16:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:16:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:15,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:15,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:15,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:16:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:15,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:15,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:15,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:15,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:15,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:15,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:15,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:15,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:15,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367515000] [2020-10-12 10:16:15,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:15,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:16:15,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059445423] [2020-10-12 10:16:15,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:16:15,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:15,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:16:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:16:15,734 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand 21 states. [2020-10-12 10:16:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:16,164 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2020-10-12 10:16:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:16:16,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-10-12 10:16:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:16,166 INFO L225 Difference]: With dead ends: 250 [2020-10-12 10:16:16,166 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 10:16:16,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:16:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 10:16:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-12 10:16:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 10:16:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2020-10-12 10:16:16,177 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 56 [2020-10-12 10:16:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:16,178 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2020-10-12 10:16:16,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:16:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2020-10-12 10:16:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:16:16,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:16,179 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:16,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:16:16,180 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1988394540, now seen corresponding path program 18 times [2020-10-12 10:16:16,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:16,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612524052] [2020-10-12 10:16:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:16:16,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-12 10:16:16,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:16:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:16:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:16,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:16,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:16:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:16,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:16,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:16,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:16,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612524052] [2020-10-12 10:16:16,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:16,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:16:16,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575985409] [2020-10-12 10:16:16,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:16:16,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:16:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:16:16,918 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand 22 states. [2020-10-12 10:16:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:17,272 INFO L93 Difference]: Finished difference Result 262 states and 302 transitions. [2020-10-12 10:16:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:16:17,273 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-12 10:16:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:17,274 INFO L225 Difference]: With dead ends: 262 [2020-10-12 10:16:17,275 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 10:16:17,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:16:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 10:16:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-10-12 10:16:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 10:16:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-10-12 10:16:17,284 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 58 [2020-10-12 10:16:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:17,285 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-10-12 10:16:17,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:16:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-10-12 10:16:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:16:17,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:17,286 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:17,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:16:17,286 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1395586742, now seen corresponding path program 19 times [2020-10-12 10:16:17,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:17,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166503060] [2020-10-12 10:16:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:16:17,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:17,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-12 10:16:17,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:16:17,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:16:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:17,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:17,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 10:16:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:17,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:16:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:17,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166503060] [2020-10-12 10:16:17,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:17,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:16:17,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844289888] [2020-10-12 10:16:17,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:16:17,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:16:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:16:17,936 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 23 states. [2020-10-12 10:16:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:18,372 INFO L93 Difference]: Finished difference Result 274 states and 316 transitions. [2020-10-12 10:16:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:16:18,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-10-12 10:16:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:18,375 INFO L225 Difference]: With dead ends: 274 [2020-10-12 10:16:18,375 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 10:16:18,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:16:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 10:16:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-12 10:16:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 10:16:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2020-10-12 10:16:18,387 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 60 [2020-10-12 10:16:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:18,387 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2020-10-12 10:16:18,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:16:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2020-10-12 10:16:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:16:18,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:18,388 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:18,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:16:18,388 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2111355672, now seen corresponding path program 20 times [2020-10-12 10:16:18,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:18,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466301313] [2020-10-12 10:16:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:18,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:18,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:16:18,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-12 10:16:18,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:16:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:16:18,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:19,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:19,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:19,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:19,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:19,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:19,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 10:16:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:19,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:19,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:19,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:19,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:19,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466301313] [2020-10-12 10:16:19,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:19,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:16:19,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241129533] [2020-10-12 10:16:19,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:16:19,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:16:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:16:19,132 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand 24 states. [2020-10-12 10:16:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:19,582 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2020-10-12 10:16:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:16:19,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-12 10:16:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:19,584 INFO L225 Difference]: With dead ends: 286 [2020-10-12 10:16:19,584 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 10:16:19,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:16:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 10:16:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-12 10:16:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 10:16:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2020-10-12 10:16:19,593 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 62 [2020-10-12 10:16:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:19,593 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2020-10-12 10:16:19,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:16:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2020-10-12 10:16:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:16:19,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:19,594 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:19,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:16:19,594 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:19,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1524437254, now seen corresponding path program 21 times [2020-10-12 10:16:19,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:19,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152078299] [2020-10-12 10:16:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:19,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:16:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-12 10:16:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:16:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 10:16:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:20,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:20,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:16:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:20,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:20,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:20,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:20,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:20,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152078299] [2020-10-12 10:16:20,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:20,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:16:20,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095895447] [2020-10-12 10:16:20,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:16:20,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:16:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:20,351 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand 25 states. [2020-10-12 10:16:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:20,776 INFO L93 Difference]: Finished difference Result 298 states and 344 transitions. [2020-10-12 10:16:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:16:20,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-12 10:16:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:20,778 INFO L225 Difference]: With dead ends: 298 [2020-10-12 10:16:20,778 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 10:16:20,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 10:16:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2020-10-12 10:16:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 10:16:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 199 transitions. [2020-10-12 10:16:20,794 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 199 transitions. Word has length 64 [2020-10-12 10:16:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:20,795 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 199 transitions. [2020-10-12 10:16:20,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:16:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 199 transitions. [2020-10-12 10:16:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:16:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:20,796 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:20,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:16:20,796 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 581939804, now seen corresponding path program 22 times [2020-10-12 10:16:20,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:20,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101473828] [2020-10-12 10:16:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:16:21,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-12 10:16:21,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:16:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:16:21,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:21,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:21,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:21,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:21,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:21,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 10:16:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:21,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:21,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:21,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101473828] [2020-10-12 10:16:21,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:21,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:16:21,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591892898] [2020-10-12 10:16:21,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:16:21,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:16:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:16:21,576 INFO L87 Difference]: Start difference. First operand 176 states and 199 transitions. Second operand 26 states. [2020-10-12 10:16:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:22,107 INFO L93 Difference]: Finished difference Result 310 states and 358 transitions. [2020-10-12 10:16:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:16:22,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-10-12 10:16:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:22,109 INFO L225 Difference]: With dead ends: 310 [2020-10-12 10:16:22,109 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 10:16:22,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:16:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 10:16:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2020-10-12 10:16:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 10:16:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2020-10-12 10:16:22,119 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 66 [2020-10-12 10:16:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:22,119 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2020-10-12 10:16:22,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:16:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2020-10-12 10:16:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 10:16:22,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:22,120 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:22,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:16:22,120 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1880696126, now seen corresponding path program 23 times [2020-10-12 10:16:22,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:22,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129376851] [2020-10-12 10:16:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:16:22,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-12 10:16:22,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:16:22,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:22,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:16:22,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:22,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:22,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:22,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 10:16:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:22,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:22,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:22,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:22,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129376851] [2020-10-12 10:16:22,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:22,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:16:22,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304324690] [2020-10-12 10:16:22,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:16:22,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:16:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:16:22,979 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand 27 states. [2020-10-12 10:16:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:23,745 INFO L93 Difference]: Finished difference Result 322 states and 372 transitions. [2020-10-12 10:16:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:16:23,745 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-10-12 10:16:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:23,748 INFO L225 Difference]: With dead ends: 322 [2020-10-12 10:16:23,748 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 10:16:23,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:16:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 10:16:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-12 10:16:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 10:16:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 215 transitions. [2020-10-12 10:16:23,762 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 215 transitions. Word has length 68 [2020-10-12 10:16:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:23,762 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 215 transitions. [2020-10-12 10:16:23,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:16:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 215 transitions. [2020-10-12 10:16:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:16:23,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:23,763 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:23,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:16:23,764 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 150038432, now seen corresponding path program 24 times [2020-10-12 10:16:23,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:23,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699864935] [2020-10-12 10:16:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:16:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-12 10:16:24,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:16:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:16:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:24,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:24,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:24,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:24,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:16:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:24,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:24,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:24,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:24,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:24,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:24,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699864935] [2020-10-12 10:16:24,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:24,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:16:24,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001832123] [2020-10-12 10:16:24,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:16:24,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:16:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:16:24,828 INFO L87 Difference]: Start difference. First operand 190 states and 215 transitions. Second operand 28 states. [2020-10-12 10:16:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:25,339 INFO L93 Difference]: Finished difference Result 334 states and 386 transitions. [2020-10-12 10:16:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:16:25,340 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-12 10:16:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:25,342 INFO L225 Difference]: With dead ends: 334 [2020-10-12 10:16:25,342 INFO L226 Difference]: Without dead ends: 199 [2020-10-12 10:16:25,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:16:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-12 10:16:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-12 10:16:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-12 10:16:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 223 transitions. [2020-10-12 10:16:25,353 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 223 transitions. Word has length 70 [2020-10-12 10:16:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:25,353 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 223 transitions. [2020-10-12 10:16:25,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:16:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 223 transitions. [2020-10-12 10:16:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:16:25,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:25,354 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:16:25,355 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -859661950, now seen corresponding path program 25 times [2020-10-12 10:16:25,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:25,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548948997] [2020-10-12 10:16:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:16:25,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:26,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:26,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:26,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:26,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:26,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:26,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:26,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:26,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:26,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:26,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 10:16:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:26,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:26,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:26,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:26,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:26,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:26,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548948997] [2020-10-12 10:16:26,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:26,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:16:26,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801380563] [2020-10-12 10:16:26,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:16:26,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:16:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:16:26,235 INFO L87 Difference]: Start difference. First operand 197 states and 223 transitions. Second operand 29 states. [2020-10-12 10:16:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:26,831 INFO L93 Difference]: Finished difference Result 346 states and 400 transitions. [2020-10-12 10:16:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:16:26,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-10-12 10:16:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:26,833 INFO L225 Difference]: With dead ends: 346 [2020-10-12 10:16:26,834 INFO L226 Difference]: Without dead ends: 206 [2020-10-12 10:16:26,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:16:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-12 10:16:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-10-12 10:16:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-12 10:16:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-10-12 10:16:26,846 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 72 [2020-10-12 10:16:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:26,847 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-10-12 10:16:26,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:16:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-10-12 10:16:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 10:16:26,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:26,848 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:26,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:16:26,848 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash -519120156, now seen corresponding path program 26 times [2020-10-12 10:16:26,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:26,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352582334] [2020-10-12 10:16:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:27,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 10:16:27,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-12 10:16:27,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:16:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 10:16:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:27,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:27,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:27,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 10:16:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:27,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:27,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:27,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:27,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:27,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352582334] [2020-10-12 10:16:27,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:27,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:16:27,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699864612] [2020-10-12 10:16:27,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:16:27,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:16:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:16:27,861 INFO L87 Difference]: Start difference. First operand 204 states and 231 transitions. Second operand 30 states. [2020-10-12 10:16:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:28,547 INFO L93 Difference]: Finished difference Result 358 states and 414 transitions. [2020-10-12 10:16:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:16:28,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-10-12 10:16:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:28,549 INFO L225 Difference]: With dead ends: 358 [2020-10-12 10:16:28,549 INFO L226 Difference]: Without dead ends: 213 [2020-10-12 10:16:28,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:16:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-12 10:16:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2020-10-12 10:16:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 10:16:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 239 transitions. [2020-10-12 10:16:28,559 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 239 transitions. Word has length 74 [2020-10-12 10:16:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:28,560 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 239 transitions. [2020-10-12 10:16:28,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:16:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 239 transitions. [2020-10-12 10:16:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 10:16:28,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:28,561 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:28,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:16:28,561 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash 324029382, now seen corresponding path program 27 times [2020-10-12 10:16:28,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:28,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449818030] [2020-10-12 10:16:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:28,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:29,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:16:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 10:16:29,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:29,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:29,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:29,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:29,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:29,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:29,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:29,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:29,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:16:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:29,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:29,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:29,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:29,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:29,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:29,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:29,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449818030] [2020-10-12 10:16:29,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:29,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:16:29,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075880777] [2020-10-12 10:16:29,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:16:29,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:29,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:16:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:16:29,616 INFO L87 Difference]: Start difference. First operand 211 states and 239 transitions. Second operand 31 states. [2020-10-12 10:16:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:30,298 INFO L93 Difference]: Finished difference Result 370 states and 428 transitions. [2020-10-12 10:16:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:16:30,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-10-12 10:16:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:30,301 INFO L225 Difference]: With dead ends: 370 [2020-10-12 10:16:30,301 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 10:16:30,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:16:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 10:16:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2020-10-12 10:16:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-12 10:16:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 247 transitions. [2020-10-12 10:16:30,317 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 247 transitions. Word has length 76 [2020-10-12 10:16:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:30,317 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 247 transitions. [2020-10-12 10:16:30,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:16:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 247 transitions. [2020-10-12 10:16:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 10:16:30,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:30,318 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:30,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:16:30,320 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1158083544, now seen corresponding path program 28 times [2020-10-12 10:16:30,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:30,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014520393] [2020-10-12 10:16:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:30,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:16:30,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:30,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:16:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:31,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:31,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 10:16:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:31,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:31,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014520393] [2020-10-12 10:16:31,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:31,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:16:31,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016893354] [2020-10-12 10:16:31,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:16:31,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:16:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:16:31,505 INFO L87 Difference]: Start difference. First operand 218 states and 247 transitions. Second operand 32 states. [2020-10-12 10:16:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:32,097 INFO L93 Difference]: Finished difference Result 382 states and 442 transitions. [2020-10-12 10:16:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:16:32,098 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-10-12 10:16:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:32,101 INFO L225 Difference]: With dead ends: 382 [2020-10-12 10:16:32,101 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 10:16:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:16:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 10:16:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2020-10-12 10:16:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-12 10:16:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 255 transitions. [2020-10-12 10:16:32,123 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 255 transitions. Word has length 78 [2020-10-12 10:16:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:32,123 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 255 transitions. [2020-10-12 10:16:32,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:16:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 255 transitions. [2020-10-12 10:16:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 10:16:32,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:32,129 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:32,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:16:32,130 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash 460536842, now seen corresponding path program 29 times [2020-10-12 10:16:32,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:32,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457511761] [2020-10-12 10:16:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 10:16:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-12 10:16:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:16:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 10:16:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:33,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:33,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:33,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-12 10:16:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:33,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:33,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:33,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457511761] [2020-10-12 10:16:33,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:33,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:16:33,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316303556] [2020-10-12 10:16:33,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:16:33,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:16:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:16:33,232 INFO L87 Difference]: Start difference. First operand 225 states and 255 transitions. Second operand 33 states. [2020-10-12 10:16:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:33,826 INFO L93 Difference]: Finished difference Result 394 states and 456 transitions. [2020-10-12 10:16:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:16:33,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-10-12 10:16:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:33,828 INFO L225 Difference]: With dead ends: 394 [2020-10-12 10:16:33,828 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 10:16:33,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:16:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 10:16:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-12 10:16:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:16:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2020-10-12 10:16:33,841 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 80 [2020-10-12 10:16:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:33,842 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2020-10-12 10:16:33,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:16:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2020-10-12 10:16:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:16:33,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:33,843 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:33,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:16:33,843 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1176566636, now seen corresponding path program 30 times [2020-10-12 10:16:33,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:33,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121182203] [2020-10-12 10:16:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:34,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:16:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 10:16:34,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:16:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:35,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:35,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:35,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121182203] [2020-10-12 10:16:35,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:35,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:16:35,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652108231] [2020-10-12 10:16:35,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:16:35,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:35,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:16:35,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:16:35,047 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand 34 states. [2020-10-12 10:16:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:35,837 INFO L93 Difference]: Finished difference Result 406 states and 470 transitions. [2020-10-12 10:16:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:16:35,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-10-12 10:16:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:35,840 INFO L225 Difference]: With dead ends: 406 [2020-10-12 10:16:35,840 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 10:16:35,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:16:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 10:16:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-10-12 10:16:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-12 10:16:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 271 transitions. [2020-10-12 10:16:35,852 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 271 transitions. Word has length 82 [2020-10-12 10:16:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:35,852 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 271 transitions. [2020-10-12 10:16:35,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:16:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 271 transitions. [2020-10-12 10:16:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 10:16:35,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:35,853 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:35,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:16:35,854 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:35,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2086431310, now seen corresponding path program 31 times [2020-10-12 10:16:35,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:35,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527436183] [2020-10-12 10:16:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:35,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:36,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:36,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:16:36,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:36,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-12 10:16:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:36,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:37,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527436183] [2020-10-12 10:16:37,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:37,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:16:37,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021270993] [2020-10-12 10:16:37,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:16:37,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:16:37,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:16:37,003 INFO L87 Difference]: Start difference. First operand 239 states and 271 transitions. Second operand 35 states. [2020-10-12 10:16:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:37,839 INFO L93 Difference]: Finished difference Result 418 states and 484 transitions. [2020-10-12 10:16:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:16:37,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-10-12 10:16:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:37,841 INFO L225 Difference]: With dead ends: 418 [2020-10-12 10:16:37,841 INFO L226 Difference]: Without dead ends: 248 [2020-10-12 10:16:37,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:16:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-12 10:16:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2020-10-12 10:16:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 10:16:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 279 transitions. [2020-10-12 10:16:37,855 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 279 transitions. Word has length 84 [2020-10-12 10:16:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:37,856 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 279 transitions. [2020-10-12 10:16:37,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:16:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 279 transitions. [2020-10-12 10:16:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 10:16:37,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:37,857 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:37,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:16:37,857 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 293054640, now seen corresponding path program 32 times [2020-10-12 10:16:37,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:37,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32425296] [2020-10-12 10:16:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 10:16:38,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:39,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:39,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:39,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:39,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:39,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-12 10:16:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:39,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32425296] [2020-10-12 10:16:39,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:39,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:16:39,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069422419] [2020-10-12 10:16:39,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:16:39,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:16:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:16:39,051 INFO L87 Difference]: Start difference. First operand 246 states and 279 transitions. Second operand 36 states. [2020-10-12 10:16:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:39,949 INFO L93 Difference]: Finished difference Result 430 states and 498 transitions. [2020-10-12 10:16:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:16:39,950 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-10-12 10:16:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:39,953 INFO L225 Difference]: With dead ends: 430 [2020-10-12 10:16:39,953 INFO L226 Difference]: Without dead ends: 255 [2020-10-12 10:16:39,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:16:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-12 10:16:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2020-10-12 10:16:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-12 10:16:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 287 transitions. [2020-10-12 10:16:39,975 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 287 transitions. Word has length 86 [2020-10-12 10:16:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:39,976 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 287 transitions. [2020-10-12 10:16:39,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:16:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 287 transitions. [2020-10-12 10:16:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 10:16:39,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:39,978 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:39,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:16:39,979 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -860039534, now seen corresponding path program 33 times [2020-10-12 10:16:39,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:39,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389880793] [2020-10-12 10:16:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:40,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 10:16:40,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:40,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-12 10:16:40,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:16:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 10:16:40,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:41,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:41,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-12 10:16:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:41,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:41,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389880793] [2020-10-12 10:16:41,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:41,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:16:41,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662492553] [2020-10-12 10:16:41,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:16:41,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:16:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:16:41,269 INFO L87 Difference]: Start difference. First operand 253 states and 287 transitions. Second operand 37 states. [2020-10-12 10:16:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:42,155 INFO L93 Difference]: Finished difference Result 442 states and 512 transitions. [2020-10-12 10:16:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:16:42,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-10-12 10:16:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:42,158 INFO L225 Difference]: With dead ends: 442 [2020-10-12 10:16:42,158 INFO L226 Difference]: Without dead ends: 262 [2020-10-12 10:16:42,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:16:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-12 10:16:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-10-12 10:16:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-12 10:16:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 295 transitions. [2020-10-12 10:16:42,172 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 295 transitions. Word has length 88 [2020-10-12 10:16:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:42,173 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 295 transitions. [2020-10-12 10:16:42,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:16:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 295 transitions. [2020-10-12 10:16:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 10:16:42,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:42,174 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:42,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:16:42,174 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -881978380, now seen corresponding path program 34 times [2020-10-12 10:16:42,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:42,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367063980] [2020-10-12 10:16:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:42,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 10:16:42,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 10:16:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:16:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 10:16:42,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-12 10:16:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:43,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:43,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:43,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:43,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:43,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367063980] [2020-10-12 10:16:43,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:43,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:16:43,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303642224] [2020-10-12 10:16:43,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:16:43,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:16:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:16:43,405 INFO L87 Difference]: Start difference. First operand 260 states and 295 transitions. Second operand 38 states. [2020-10-12 10:16:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:44,368 INFO L93 Difference]: Finished difference Result 454 states and 526 transitions. [2020-10-12 10:16:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:16:44,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-10-12 10:16:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:44,370 INFO L225 Difference]: With dead ends: 454 [2020-10-12 10:16:44,371 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 10:16:44,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:16:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 10:16:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2020-10-12 10:16:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 10:16:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 303 transitions. [2020-10-12 10:16:44,383 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 303 transitions. Word has length 90 [2020-10-12 10:16:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:44,384 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 303 transitions. [2020-10-12 10:16:44,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:16:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 303 transitions. [2020-10-12 10:16:44,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 10:16:44,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:44,385 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:44,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:16:44,385 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -490372906, now seen corresponding path program 35 times [2020-10-12 10:16:44,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:44,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924378880] [2020-10-12 10:16:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:16:44,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-12 10:16:44,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:16:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 10:16:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:45,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-12 10:16:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:45,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:45,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:45,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:45,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:45,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:45,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924378880] [2020-10-12 10:16:45,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:45,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:16:45,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654383748] [2020-10-12 10:16:45,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:16:45,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:16:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:16:45,665 INFO L87 Difference]: Start difference. First operand 267 states and 303 transitions. Second operand 39 states. [2020-10-12 10:16:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:46,632 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2020-10-12 10:16:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:16:46,632 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-10-12 10:16:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:46,635 INFO L225 Difference]: With dead ends: 466 [2020-10-12 10:16:46,635 INFO L226 Difference]: Without dead ends: 276 [2020-10-12 10:16:46,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:16:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-12 10:16:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2020-10-12 10:16:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 10:16:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2020-10-12 10:16:46,647 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 92 [2020-10-12 10:16:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:46,647 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2020-10-12 10:16:46,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:16:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2020-10-12 10:16:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 10:16:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:46,648 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:46,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:16:46,648 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2114634440, now seen corresponding path program 36 times [2020-10-12 10:16:46,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:46,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832916987] [2020-10-12 10:16:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:46,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 10:16:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:47,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:47,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:47,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:47,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-12 10:16:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:47,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:47,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:47,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:47,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:47,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832916987] [2020-10-12 10:16:47,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:47,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:16:47,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485427775] [2020-10-12 10:16:47,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:16:47,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:47,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:16:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:16:47,911 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand 40 states. [2020-10-12 10:16:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:48,927 INFO L93 Difference]: Finished difference Result 478 states and 554 transitions. [2020-10-12 10:16:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:16:48,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-10-12 10:16:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:48,929 INFO L225 Difference]: With dead ends: 478 [2020-10-12 10:16:48,929 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 10:16:48,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:16:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 10:16:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2020-10-12 10:16:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 10:16:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 319 transitions. [2020-10-12 10:16:48,942 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 319 transitions. Word has length 94 [2020-10-12 10:16:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:48,942 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 319 transitions. [2020-10-12 10:16:48,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:16:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 319 transitions. [2020-10-12 10:16:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 10:16:48,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:48,944 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:48,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:16:48,944 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash 338127130, now seen corresponding path program 37 times [2020-10-12 10:16:48,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:48,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49670427] [2020-10-12 10:16:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:48,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:49,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:49,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 10:16:49,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-12 10:16:49,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:16:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 10:16:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:50,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:50,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:50,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:50,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-12 10:16:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:50,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:50,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:50,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:50,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:50,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:50,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:50,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:50,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49670427] [2020-10-12 10:16:50,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:50,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:16:50,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155399956] [2020-10-12 10:16:50,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:16:50,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:16:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:16:50,292 INFO L87 Difference]: Start difference. First operand 281 states and 319 transitions. Second operand 41 states. [2020-10-12 10:16:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:51,070 INFO L93 Difference]: Finished difference Result 490 states and 568 transitions. [2020-10-12 10:16:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:16:51,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-10-12 10:16:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:51,073 INFO L225 Difference]: With dead ends: 490 [2020-10-12 10:16:51,073 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 10:16:51,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:16:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 10:16:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2020-10-12 10:16:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-12 10:16:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2020-10-12 10:16:51,085 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 96 [2020-10-12 10:16:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:51,085 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2020-10-12 10:16:51,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:16:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2020-10-12 10:16:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 10:16:51,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:51,086 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:51,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:16:51,087 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash -495049604, now seen corresponding path program 38 times [2020-10-12 10:16:51,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:51,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129754673] [2020-10-12 10:16:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:51,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:51,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:51,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 10:16:51,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 10:16:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:52,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:52,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:52,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-12 10:16:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:52,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:52,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:52,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:52,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:52,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129754673] [2020-10-12 10:16:52,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:52,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:16:52,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522845957] [2020-10-12 10:16:52,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:16:52,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:16:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:16:52,746 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand 42 states. [2020-10-12 10:16:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:53,560 INFO L93 Difference]: Finished difference Result 502 states and 582 transitions. [2020-10-12 10:16:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:16:53,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-10-12 10:16:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:53,566 INFO L225 Difference]: With dead ends: 502 [2020-10-12 10:16:53,567 INFO L226 Difference]: Without dead ends: 297 [2020-10-12 10:16:53,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:16:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-12 10:16:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2020-10-12 10:16:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-12 10:16:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 335 transitions. [2020-10-12 10:16:53,590 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 335 transitions. Word has length 98 [2020-10-12 10:16:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:53,590 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 335 transitions. [2020-10-12 10:16:53,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:16:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 335 transitions. [2020-10-12 10:16:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 10:16:53,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:53,591 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:53,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 10:16:53,592 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1980993374, now seen corresponding path program 39 times [2020-10-12 10:16:53,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:53,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981990115] [2020-10-12 10:16:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:54,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:54,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 10:16:54,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-12 10:16:54,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:16:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 10:16:54,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:55,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:55,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:55,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:55,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:55,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-12 10:16:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:55,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:55,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981990115] [2020-10-12 10:16:55,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:55,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:16:55,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779242506] [2020-10-12 10:16:55,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:16:55,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:55,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:16:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:16:55,234 INFO L87 Difference]: Start difference. First operand 295 states and 335 transitions. Second operand 43 states. [2020-10-12 10:16:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:56,385 INFO L93 Difference]: Finished difference Result 514 states and 596 transitions. [2020-10-12 10:16:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:16:56,385 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-10-12 10:16:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:56,387 INFO L225 Difference]: With dead ends: 514 [2020-10-12 10:16:56,388 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:16:56,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:16:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:16:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2020-10-12 10:16:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-12 10:16:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 343 transitions. [2020-10-12 10:16:56,400 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 343 transitions. Word has length 100 [2020-10-12 10:16:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:56,400 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 343 transitions. [2020-10-12 10:16:56,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:16:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 343 transitions. [2020-10-12 10:16:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 10:16:56,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:56,401 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:56,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 10:16:56,402 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2046413248, now seen corresponding path program 40 times [2020-10-12 10:16:56,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:56,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566667978] [2020-10-12 10:16:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:16:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:57,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 10:16:57,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:58,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-12 10:16:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:58,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:58,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:58,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:16:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:58,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566667978] [2020-10-12 10:16:58,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:58,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:16:58,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618512360] [2020-10-12 10:16:58,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:16:58,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:16:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:16:58,013 INFO L87 Difference]: Start difference. First operand 302 states and 343 transitions. Second operand 44 states. [2020-10-12 10:16:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:59,025 INFO L93 Difference]: Finished difference Result 526 states and 610 transitions. [2020-10-12 10:16:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:16:59,026 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 102 [2020-10-12 10:16:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:59,028 INFO L225 Difference]: With dead ends: 526 [2020-10-12 10:16:59,028 INFO L226 Difference]: Without dead ends: 311 [2020-10-12 10:16:59,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:16:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-12 10:16:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2020-10-12 10:16:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-12 10:16:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 351 transitions. [2020-10-12 10:16:59,040 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 351 transitions. Word has length 102 [2020-10-12 10:16:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:59,040 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 351 transitions. [2020-10-12 10:16:59,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 10:16:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 351 transitions. [2020-10-12 10:16:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 10:16:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:59,041 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:59,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 10:16:59,042 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash 490402722, now seen corresponding path program 41 times [2020-10-12 10:16:59,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:59,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030710115] [2020-10-12 10:16:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 10:16:59,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:00,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:00,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-12 10:17:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:00,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:00,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:00,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030710115] [2020-10-12 10:17:00,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:00,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 10:17:00,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761513512] [2020-10-12 10:17:00,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 10:17:00,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:00,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 10:17:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:17:00,723 INFO L87 Difference]: Start difference. First operand 309 states and 351 transitions. Second operand 45 states. [2020-10-12 10:17:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:01,969 INFO L93 Difference]: Finished difference Result 538 states and 624 transitions. [2020-10-12 10:17:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:17:01,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 104 [2020-10-12 10:17:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:01,984 INFO L225 Difference]: With dead ends: 538 [2020-10-12 10:17:01,984 INFO L226 Difference]: Without dead ends: 318 [2020-10-12 10:17:01,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:17:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-12 10:17:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2020-10-12 10:17:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-12 10:17:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 359 transitions. [2020-10-12 10:17:01,995 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 359 transitions. Word has length 104 [2020-10-12 10:17:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:01,995 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 359 transitions. [2020-10-12 10:17:01,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 10:17:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 359 transitions. [2020-10-12 10:17:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 10:17:01,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:01,996 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:01,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 10:17:01,996 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash -187093756, now seen corresponding path program 42 times [2020-10-12 10:17:01,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:01,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602090523] [2020-10-12 10:17:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:17:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:02,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 10:17:02,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:03,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:03,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-12 10:17:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:03,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:03,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:03,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602090523] [2020-10-12 10:17:03,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:03,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:17:03,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517934398] [2020-10-12 10:17:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:17:03,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:17:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:17:03,701 INFO L87 Difference]: Start difference. First operand 316 states and 359 transitions. Second operand 46 states. [2020-10-12 10:17:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:04,808 INFO L93 Difference]: Finished difference Result 550 states and 638 transitions. [2020-10-12 10:17:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:17:04,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2020-10-12 10:17:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:04,811 INFO L225 Difference]: With dead ends: 550 [2020-10-12 10:17:04,811 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 10:17:04,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:17:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 10:17:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-10-12 10:17:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-12 10:17:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 367 transitions. [2020-10-12 10:17:04,821 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 367 transitions. Word has length 106 [2020-10-12 10:17:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:04,822 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 367 transitions. [2020-10-12 10:17:04,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:17:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 367 transitions. [2020-10-12 10:17:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 10:17:04,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:04,823 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:04,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 10:17:04,823 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1573819878, now seen corresponding path program 43 times [2020-10-12 10:17:04,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:04,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660979795] [2020-10-12 10:17:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 10:17:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:06,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:06,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:06,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:06,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:06,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:06,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:06,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:06,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:06,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-12 10:17:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:06,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:06,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660979795] [2020-10-12 10:17:06,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:06,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:17:06,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003984079] [2020-10-12 10:17:06,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:17:06,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:17:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:17:06,602 INFO L87 Difference]: Start difference. First operand 323 states and 367 transitions. Second operand 47 states. [2020-10-12 10:17:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:07,982 INFO L93 Difference]: Finished difference Result 562 states and 652 transitions. [2020-10-12 10:17:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:17:07,982 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 108 [2020-10-12 10:17:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:07,984 INFO L225 Difference]: With dead ends: 562 [2020-10-12 10:17:07,984 INFO L226 Difference]: Without dead ends: 332 [2020-10-12 10:17:07,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:17:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-12 10:17:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-10-12 10:17:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-12 10:17:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 375 transitions. [2020-10-12 10:17:07,993 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 375 transitions. Word has length 108 [2020-10-12 10:17:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:07,994 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 375 transitions. [2020-10-12 10:17:07,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:17:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 375 transitions. [2020-10-12 10:17:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 10:17:07,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:07,995 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:07,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 10:17:07,995 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1594707528, now seen corresponding path program 44 times [2020-10-12 10:17:07,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:07,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519145327] [2020-10-12 10:17:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:08,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:08,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 10:17:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:09,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:09,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-12 10:17:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:09,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:09,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:09,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519145327] [2020-10-12 10:17:09,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:09,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 10:17:09,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250253088] [2020-10-12 10:17:09,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 10:17:09,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 10:17:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:17:09,888 INFO L87 Difference]: Start difference. First operand 330 states and 375 transitions. Second operand 48 states. [2020-10-12 10:17:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:10,926 INFO L93 Difference]: Finished difference Result 574 states and 666 transitions. [2020-10-12 10:17:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:17:10,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2020-10-12 10:17:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:10,929 INFO L225 Difference]: With dead ends: 574 [2020-10-12 10:17:10,929 INFO L226 Difference]: Without dead ends: 339 [2020-10-12 10:17:10,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:17:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-12 10:17:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2020-10-12 10:17:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-12 10:17:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 383 transitions. [2020-10-12 10:17:10,943 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 383 transitions. Word has length 110 [2020-10-12 10:17:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:10,943 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 383 transitions. [2020-10-12 10:17:10,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 10:17:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 383 transitions. [2020-10-12 10:17:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 10:17:10,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:10,944 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:10,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 10:17:10,945 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash 192902698, now seen corresponding path program 45 times [2020-10-12 10:17:10,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:10,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37306225] [2020-10-12 10:17:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:10,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 10:17:11,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:11,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 10:17:11,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:12,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:12,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:12,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:12,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:12,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:12,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:12,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:12,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:12,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:12,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:12,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-12 10:17:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:12,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:12,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:12,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:12,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:12,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:12,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:12,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:12,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:12,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:13,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37306225] [2020-10-12 10:17:13,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:13,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 10:17:13,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121758887] [2020-10-12 10:17:13,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 10:17:13,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 10:17:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:17:13,010 INFO L87 Difference]: Start difference. First operand 337 states and 383 transitions. Second operand 49 states. [2020-10-12 10:17:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:14,068 INFO L93 Difference]: Finished difference Result 586 states and 680 transitions. [2020-10-12 10:17:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:17:14,069 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 112 [2020-10-12 10:17:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:14,071 INFO L225 Difference]: With dead ends: 586 [2020-10-12 10:17:14,072 INFO L226 Difference]: Without dead ends: 346 [2020-10-12 10:17:14,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:17:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-12 10:17:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2020-10-12 10:17:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-12 10:17:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2020-10-12 10:17:14,082 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 112 [2020-10-12 10:17:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:14,082 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2020-10-12 10:17:14,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 10:17:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2020-10-12 10:17:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 10:17:14,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:14,083 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:14,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 10:17:14,084 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1678192012, now seen corresponding path program 46 times [2020-10-12 10:17:14,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:14,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074820229] [2020-10-12 10:17:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:14,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:14,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 10:17:14,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-12 10:17:14,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 10:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 10:17:14,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:16,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:16,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:16,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:16,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 10:17:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:16,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:16,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:16,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:16,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:16,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074820229] [2020-10-12 10:17:16,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:16,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 10:17:16,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460418081] [2020-10-12 10:17:16,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 10:17:16,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 10:17:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:17:16,094 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand 50 states. [2020-10-12 10:17:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:17,581 INFO L93 Difference]: Finished difference Result 598 states and 694 transitions. [2020-10-12 10:17:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:17:17,582 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 114 [2020-10-12 10:17:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:17,583 INFO L225 Difference]: With dead ends: 598 [2020-10-12 10:17:17,583 INFO L226 Difference]: Without dead ends: 353 [2020-10-12 10:17:17,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:17:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-12 10:17:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2020-10-12 10:17:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-12 10:17:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 399 transitions. [2020-10-12 10:17:17,594 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 399 transitions. Word has length 114 [2020-10-12 10:17:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:17,595 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 399 transitions. [2020-10-12 10:17:17,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 10:17:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 399 transitions. [2020-10-12 10:17:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 10:17:17,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:17,596 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:17,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 10:17:17,596 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1182886802, now seen corresponding path program 47 times [2020-10-12 10:17:17,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:17,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364196152] [2020-10-12 10:17:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:17,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 10:17:18,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:19,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:19,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-12 10:17:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:19,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:19,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364196152] [2020-10-12 10:17:19,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:19,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 10:17:19,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972213546] [2020-10-12 10:17:19,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 10:17:19,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 10:17:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:17:19,710 INFO L87 Difference]: Start difference. First operand 351 states and 399 transitions. Second operand 51 states. [2020-10-12 10:17:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:21,301 INFO L93 Difference]: Finished difference Result 610 states and 708 transitions. [2020-10-12 10:17:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 10:17:21,302 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 116 [2020-10-12 10:17:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:21,304 INFO L225 Difference]: With dead ends: 610 [2020-10-12 10:17:21,304 INFO L226 Difference]: Without dead ends: 360 [2020-10-12 10:17:21,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:17:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-12 10:17:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 358. [2020-10-12 10:17:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-12 10:17:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 407 transitions. [2020-10-12 10:17:21,314 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 407 transitions. Word has length 116 [2020-10-12 10:17:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:21,315 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 407 transitions. [2020-10-12 10:17:21,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 10:17:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 407 transitions. [2020-10-12 10:17:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 10:17:21,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:21,316 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:21,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 10:17:21,316 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1900557616, now seen corresponding path program 48 times [2020-10-12 10:17:21,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:21,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626731473] [2020-10-12 10:17:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 10:17:22,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:22,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 10:17:22,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-12 10:17:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:23,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626731473] [2020-10-12 10:17:23,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:23,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 10:17:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142094341] [2020-10-12 10:17:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 10:17:23,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 10:17:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:17:23,520 INFO L87 Difference]: Start difference. First operand 358 states and 407 transitions. Second operand 52 states. [2020-10-12 10:17:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:25,791 INFO L93 Difference]: Finished difference Result 622 states and 722 transitions. [2020-10-12 10:17:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:17:25,792 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 118 [2020-10-12 10:17:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:25,796 INFO L225 Difference]: With dead ends: 622 [2020-10-12 10:17:25,796 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 10:17:25,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:17:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 10:17:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2020-10-12 10:17:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-12 10:17:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2020-10-12 10:17:25,809 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 118 [2020-10-12 10:17:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:25,810 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2020-10-12 10:17:25,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 10:17:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2020-10-12 10:17:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 10:17:25,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:25,811 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:25,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 10:17:25,812 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -92475214, now seen corresponding path program 49 times [2020-10-12 10:17:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:25,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931053288] [2020-10-12 10:17:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:28,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 10:17:28,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:28,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2724 [2020-10-12 10:17:28,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 10:17:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 10:17:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:29,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:29,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:29,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:29,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:29,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:29,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:29,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:29,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:29,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:29,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-12 10:17:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:29,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:29,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931053288] [2020-10-12 10:17:29,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:29,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 10:17:29,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631351654] [2020-10-12 10:17:29,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 10:17:29,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 10:17:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:17:29,883 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand 53 states. [2020-10-12 10:17:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:31,552 INFO L93 Difference]: Finished difference Result 634 states and 736 transitions. [2020-10-12 10:17:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:17:31,552 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 120 [2020-10-12 10:17:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:31,554 INFO L225 Difference]: With dead ends: 634 [2020-10-12 10:17:31,554 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 10:17:31,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:17:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 10:17:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 372. [2020-10-12 10:17:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-12 10:17:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 423 transitions. [2020-10-12 10:17:31,565 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 423 transitions. Word has length 120 [2020-10-12 10:17:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:31,565 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 423 transitions. [2020-10-12 10:17:31,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 10:17:31,565 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 423 transitions. [2020-10-12 10:17:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 10:17:31,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:31,566 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:31,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 10:17:31,567 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1987041772, now seen corresponding path program 50 times [2020-10-12 10:17:31,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:31,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330244963] [2020-10-12 10:17:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:33,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:33,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 10:17:33,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 10:17:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:35,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-12 10:17:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:35,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:35,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:35,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:35,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330244963] [2020-10-12 10:17:35,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:35,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 10:17:35,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133041018] [2020-10-12 10:17:35,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 10:17:35,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 10:17:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:17:35,157 INFO L87 Difference]: Start difference. First operand 372 states and 423 transitions. Second operand 54 states. [2020-10-12 10:17:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:36,857 INFO L93 Difference]: Finished difference Result 646 states and 750 transitions. [2020-10-12 10:17:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 10:17:36,857 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2020-10-12 10:17:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:36,859 INFO L225 Difference]: With dead ends: 646 [2020-10-12 10:17:36,859 INFO L226 Difference]: Without dead ends: 381 [2020-10-12 10:17:36,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:17:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-12 10:17:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2020-10-12 10:17:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 10:17:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 431 transitions. [2020-10-12 10:17:36,870 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 431 transitions. Word has length 122 [2020-10-12 10:17:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:36,870 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 431 transitions. [2020-10-12 10:17:36,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 10:17:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 431 transitions. [2020-10-12 10:17:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 10:17:36,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:36,871 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:36,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 10:17:36,871 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1599370506, now seen corresponding path program 51 times [2020-10-12 10:17:36,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:36,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869181659] [2020-10-12 10:17:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:38,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:38,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 10:17:38,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1727 [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 10:17:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:40,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:40,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:40,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-12 10:17:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:40,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 2 proven. 2601 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:40,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869181659] [2020-10-12 10:17:40,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:40,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 10:17:40,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332954924] [2020-10-12 10:17:40,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 10:17:40,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 10:17:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:17:40,131 INFO L87 Difference]: Start difference. First operand 379 states and 431 transitions. Second operand 55 states. [2020-10-12 10:17:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:41,936 INFO L93 Difference]: Finished difference Result 658 states and 764 transitions. [2020-10-12 10:17:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 10:17:41,937 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 124 [2020-10-12 10:17:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:41,939 INFO L225 Difference]: With dead ends: 658 [2020-10-12 10:17:41,939 INFO L226 Difference]: Without dead ends: 388 [2020-10-12 10:17:41,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:17:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-12 10:17:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 386. [2020-10-12 10:17:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-12 10:17:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 439 transitions. [2020-10-12 10:17:41,950 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 439 transitions. Word has length 124 [2020-10-12 10:17:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:41,950 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 439 transitions. [2020-10-12 10:17:41,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 10:17:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 439 transitions. [2020-10-12 10:17:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 10:17:41,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:41,952 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:41,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 10:17:41,952 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1585528664, now seen corresponding path program 52 times [2020-10-12 10:17:41,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:41,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920952488] [2020-10-12 10:17:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:43,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:43,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 10:17:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:44,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:44,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:44,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:44,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:44,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-12 10:17:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:44,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:44,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:44,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:44,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:44,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:45,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920952488] [2020-10-12 10:17:45,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:45,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 10:17:45,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178980637] [2020-10-12 10:17:45,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 10:17:45,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 10:17:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:17:45,011 INFO L87 Difference]: Start difference. First operand 386 states and 439 transitions. Second operand 56 states. [2020-10-12 10:17:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:46,883 INFO L93 Difference]: Finished difference Result 670 states and 778 transitions. [2020-10-12 10:17:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 10:17:46,883 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 126 [2020-10-12 10:17:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:46,885 INFO L225 Difference]: With dead ends: 670 [2020-10-12 10:17:46,886 INFO L226 Difference]: Without dead ends: 395 [2020-10-12 10:17:46,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:17:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-12 10:17:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2020-10-12 10:17:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-12 10:17:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 447 transitions. [2020-10-12 10:17:46,896 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 447 transitions. Word has length 126 [2020-10-12 10:17:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:46,896 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 447 transitions. [2020-10-12 10:17:46,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 10:17:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 447 transitions. [2020-10-12 10:17:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 10:17:46,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:46,898 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:46,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 10:17:46,898 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -38051014, now seen corresponding path program 53 times [2020-10-12 10:17:46,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:46,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830582578] [2020-10-12 10:17:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:46,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:48,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:48,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 10:17:48,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:48,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-12 10:17:48,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:48,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 10:17:48,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:48,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 10:17:48,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:49,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:49,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:49,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:49,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:49,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:49,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-12 10:17:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:49,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:49,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 2 proven. 2809 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:49,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830582578] [2020-10-12 10:17:49,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:49,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 10:17:49,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377083633] [2020-10-12 10:17:49,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 10:17:49,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:49,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 10:17:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:17:49,955 INFO L87 Difference]: Start difference. First operand 393 states and 447 transitions. Second operand 57 states. [2020-10-12 10:17:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:51,824 INFO L93 Difference]: Finished difference Result 682 states and 792 transitions. [2020-10-12 10:17:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 10:17:51,824 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 128 [2020-10-12 10:17:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:51,826 INFO L225 Difference]: With dead ends: 682 [2020-10-12 10:17:51,826 INFO L226 Difference]: Without dead ends: 402 [2020-10-12 10:17:51,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:17:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-12 10:17:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-10-12 10:17:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-12 10:17:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 455 transitions. [2020-10-12 10:17:51,836 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 455 transitions. Word has length 128 [2020-10-12 10:17:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:51,836 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 455 transitions. [2020-10-12 10:17:51,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 10:17:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 455 transitions. [2020-10-12 10:17:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 10:17:51,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:51,838 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:51,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 10:17:51,838 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1224993124, now seen corresponding path program 54 times [2020-10-12 10:17:51,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:51,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923395694] [2020-10-12 10:17:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:53,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:53,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 10:17:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:54,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:54,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-12 10:17:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:54,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:54,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:54,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:54,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923395694] [2020-10-12 10:17:54,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:54,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 10:17:54,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743441304] [2020-10-12 10:17:54,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 10:17:54,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 10:17:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:17:54,938 INFO L87 Difference]: Start difference. First operand 400 states and 455 transitions. Second operand 58 states. [2020-10-12 10:17:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:56,372 INFO L93 Difference]: Finished difference Result 694 states and 806 transitions. [2020-10-12 10:17:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 10:17:56,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 130 [2020-10-12 10:17:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:56,375 INFO L225 Difference]: With dead ends: 694 [2020-10-12 10:17:56,375 INFO L226 Difference]: Without dead ends: 409 [2020-10-12 10:17:56,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:17:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-12 10:17:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2020-10-12 10:17:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-12 10:17:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 463 transitions. [2020-10-12 10:17:56,386 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 463 transitions. Word has length 130 [2020-10-12 10:17:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:56,387 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 463 transitions. [2020-10-12 10:17:56,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 10:17:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 463 transitions. [2020-10-12 10:17:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 10:17:56,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:56,388 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:56,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 10:17:56,388 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash 584939902, now seen corresponding path program 55 times [2020-10-12 10:17:56,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:56,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880490268] [2020-10-12 10:17:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:57,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 10:17:57,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:59,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:59,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:59,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:59,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:59,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-12 10:17:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:59,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 2 proven. 3025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:17:59,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880490268] [2020-10-12 10:17:59,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:59,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 10:17:59,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315846566] [2020-10-12 10:17:59,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 10:17:59,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 10:17:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:17:59,776 INFO L87 Difference]: Start difference. First operand 407 states and 463 transitions. Second operand 59 states. [2020-10-12 10:18:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:01,871 INFO L93 Difference]: Finished difference Result 706 states and 820 transitions. [2020-10-12 10:18:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 10:18:01,872 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-10-12 10:18:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:01,873 INFO L225 Difference]: With dead ends: 706 [2020-10-12 10:18:01,873 INFO L226 Difference]: Without dead ends: 416 [2020-10-12 10:18:01,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:18:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-12 10:18:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2020-10-12 10:18:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-12 10:18:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 471 transitions. [2020-10-12 10:18:01,884 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 471 transitions. Word has length 132 [2020-10-12 10:18:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:01,884 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 471 transitions. [2020-10-12 10:18:01,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 10:18:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 471 transitions. [2020-10-12 10:18:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 10:18:01,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:01,886 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:01,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 10:18:01,886 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash 468823008, now seen corresponding path program 56 times [2020-10-12 10:18:01,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:01,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021962790] [2020-10-12 10:18:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:01,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:03,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:03,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 10:18:03,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:03,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1407 [2020-10-12 10:18:03,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:03,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 10:18:03,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:03,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 10:18:03,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:05,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:05,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:05,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-12 10:18:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:05,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:05,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:05,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021962790] [2020-10-12 10:18:05,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:05,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 10:18:05,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284319203] [2020-10-12 10:18:05,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 10:18:05,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 10:18:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 10:18:05,179 INFO L87 Difference]: Start difference. First operand 414 states and 471 transitions. Second operand 60 states. [2020-10-12 10:18:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:07,274 INFO L93 Difference]: Finished difference Result 718 states and 834 transitions. [2020-10-12 10:18:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 10:18:07,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 134 [2020-10-12 10:18:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:07,276 INFO L225 Difference]: With dead ends: 718 [2020-10-12 10:18:07,276 INFO L226 Difference]: Without dead ends: 423 [2020-10-12 10:18:07,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 10:18:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-12 10:18:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2020-10-12 10:18:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-12 10:18:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 479 transitions. [2020-10-12 10:18:07,288 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 479 transitions. Word has length 134 [2020-10-12 10:18:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:07,289 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 479 transitions. [2020-10-12 10:18:07,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 10:18:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 479 transitions. [2020-10-12 10:18:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 10:18:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:07,290 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:07,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 10:18:07,290 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash 549637570, now seen corresponding path program 57 times [2020-10-12 10:18:07,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:07,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520082593] [2020-10-12 10:18:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:08,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:08,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 10:18:08,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:08,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-12 10:18:08,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 10:18:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 10:18:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:10,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:10,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:10,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:10,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:10,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-12 10:18:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:10,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:10,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:10,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:10,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 2 proven. 3249 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:10,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520082593] [2020-10-12 10:18:10,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:10,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 10:18:10,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654913943] [2020-10-12 10:18:10,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 10:18:10,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 10:18:10,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 10:18:10,917 INFO L87 Difference]: Start difference. First operand 421 states and 479 transitions. Second operand 61 states. [2020-10-12 10:18:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:12,846 INFO L93 Difference]: Finished difference Result 730 states and 848 transitions. [2020-10-12 10:18:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 10:18:12,847 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 136 [2020-10-12 10:18:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:12,851 INFO L225 Difference]: With dead ends: 730 [2020-10-12 10:18:12,851 INFO L226 Difference]: Without dead ends: 430 [2020-10-12 10:18:12,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 10:18:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-12 10:18:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 428. [2020-10-12 10:18:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-12 10:18:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 487 transitions. [2020-10-12 10:18:12,863 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 487 transitions. Word has length 136 [2020-10-12 10:18:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:12,863 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 487 transitions. [2020-10-12 10:18:12,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 10:18:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 487 transitions. [2020-10-12 10:18:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 10:18:12,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:12,864 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:12,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 10:18:12,864 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 903020324, now seen corresponding path program 58 times [2020-10-12 10:18:12,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:12,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474547748] [2020-10-12 10:18:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 10:18:14,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 10:18:14,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:16,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:16,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-12 10:18:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:16,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:16,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:16,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 3364 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:16,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474547748] [2020-10-12 10:18:16,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:16,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 10:18:16,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405962941] [2020-10-12 10:18:16,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 10:18:16,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 10:18:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:18:16,519 INFO L87 Difference]: Start difference. First operand 428 states and 487 transitions. Second operand 62 states. [2020-10-12 10:18:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:18,481 INFO L93 Difference]: Finished difference Result 742 states and 862 transitions. [2020-10-12 10:18:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 10:18:18,481 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 138 [2020-10-12 10:18:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:18,484 INFO L225 Difference]: With dead ends: 742 [2020-10-12 10:18:18,485 INFO L226 Difference]: Without dead ends: 437 [2020-10-12 10:18:18,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:18:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-12 10:18:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 435. [2020-10-12 10:18:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 10:18:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 495 transitions. [2020-10-12 10:18:18,497 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 495 transitions. Word has length 138 [2020-10-12 10:18:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:18,497 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 495 transitions. [2020-10-12 10:18:18,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 10:18:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 495 transitions. [2020-10-12 10:18:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 10:18:18,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:18,498 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:18,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 10:18:18,499 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:18,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1201430534, now seen corresponding path program 59 times [2020-10-12 10:18:18,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:18,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189571415] [2020-10-12 10:18:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:18,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:20,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 10:18:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 10:18:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:22,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:22,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-12 10:18:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:22,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:22,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 2 proven. 3481 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:22,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189571415] [2020-10-12 10:18:22,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:22,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 10:18:22,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780629364] [2020-10-12 10:18:22,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 10:18:22,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:22,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 10:18:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:18:22,700 INFO L87 Difference]: Start difference. First operand 435 states and 495 transitions. Second operand 63 states. [2020-10-12 10:18:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:25,031 INFO L93 Difference]: Finished difference Result 754 states and 876 transitions. [2020-10-12 10:18:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 10:18:25,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 140 [2020-10-12 10:18:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:25,033 INFO L225 Difference]: With dead ends: 754 [2020-10-12 10:18:25,033 INFO L226 Difference]: Without dead ends: 444 [2020-10-12 10:18:25,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:18:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-12 10:18:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2020-10-12 10:18:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-12 10:18:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 503 transitions. [2020-10-12 10:18:25,042 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 503 transitions. Word has length 140 [2020-10-12 10:18:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:25,043 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 503 transitions. [2020-10-12 10:18:25,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 10:18:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 503 transitions. [2020-10-12 10:18:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 10:18:25,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:25,044 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:25,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 10:18:25,044 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash 210833512, now seen corresponding path program 60 times [2020-10-12 10:18:25,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:25,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825029119] [2020-10-12 10:18:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:25,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:27,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 10:18:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:29,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:29,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:29,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:29,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-12 10:18:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:29,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:29,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:29,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 3600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:29,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825029119] [2020-10-12 10:18:29,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:29,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 10:18:29,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504448381] [2020-10-12 10:18:29,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 10:18:29,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 10:18:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:18:29,321 INFO L87 Difference]: Start difference. First operand 442 states and 503 transitions. Second operand 64 states. [2020-10-12 10:18:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:31,642 INFO L93 Difference]: Finished difference Result 766 states and 890 transitions. [2020-10-12 10:18:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 10:18:31,643 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 142 [2020-10-12 10:18:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:31,645 INFO L225 Difference]: With dead ends: 766 [2020-10-12 10:18:31,645 INFO L226 Difference]: Without dead ends: 451 [2020-10-12 10:18:31,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:18:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-12 10:18:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2020-10-12 10:18:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-12 10:18:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 511 transitions. [2020-10-12 10:18:31,656 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 511 transitions. Word has length 142 [2020-10-12 10:18:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:31,656 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 511 transitions. [2020-10-12 10:18:31,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 10:18:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 511 transitions. [2020-10-12 10:18:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 10:18:31,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:31,657 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:31,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 10:18:31,658 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1729835082, now seen corresponding path program 61 times [2020-10-12 10:18:31,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:31,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550802098] [2020-10-12 10:18:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:33,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 10:18:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 10:18:33,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:36,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:36,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:36,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-12 10:18:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 2 proven. 3721 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:36,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550802098] [2020-10-12 10:18:36,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:36,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 10:18:36,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601343376] [2020-10-12 10:18:36,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 10:18:36,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 10:18:36,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 10:18:36,183 INFO L87 Difference]: Start difference. First operand 449 states and 511 transitions. Second operand 65 states. [2020-10-12 10:18:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:38,641 INFO L93 Difference]: Finished difference Result 778 states and 904 transitions. [2020-10-12 10:18:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 10:18:38,641 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 144 [2020-10-12 10:18:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:38,644 INFO L225 Difference]: With dead ends: 778 [2020-10-12 10:18:38,644 INFO L226 Difference]: Without dead ends: 458 [2020-10-12 10:18:38,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 10:18:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-12 10:18:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-10-12 10:18:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-12 10:18:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 519 transitions. [2020-10-12 10:18:38,657 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 519 transitions. Word has length 144 [2020-10-12 10:18:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:38,657 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 519 transitions. [2020-10-12 10:18:38,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 10:18:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 519 transitions. [2020-10-12 10:18:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 10:18:38,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:38,659 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:38,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 10:18:38,659 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1201463212, now seen corresponding path program 62 times [2020-10-12 10:18:38,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:38,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811010059] [2020-10-12 10:18:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:38,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:41,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:41,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 10:18:41,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:41,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2317 [2020-10-12 10:18:41,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 10:18:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 10:18:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:43,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:43,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:43,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:43,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:43,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-12 10:18:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:43,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:43,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:43,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811010059] [2020-10-12 10:18:43,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:43,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 10:18:43,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881750753] [2020-10-12 10:18:43,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 10:18:43,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 10:18:43,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 10:18:43,289 INFO L87 Difference]: Start difference. First operand 456 states and 519 transitions. Second operand 66 states. [2020-10-12 10:18:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:45,426 INFO L93 Difference]: Finished difference Result 790 states and 918 transitions. [2020-10-12 10:18:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 10:18:45,426 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 146 [2020-10-12 10:18:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:45,429 INFO L225 Difference]: With dead ends: 790 [2020-10-12 10:18:45,430 INFO L226 Difference]: Without dead ends: 465 [2020-10-12 10:18:45,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 10:18:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-12 10:18:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 463. [2020-10-12 10:18:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-10-12 10:18:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 527 transitions. [2020-10-12 10:18:45,441 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 527 transitions. Word has length 146 [2020-10-12 10:18:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:45,441 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 527 transitions. [2020-10-12 10:18:45,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 10:18:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 527 transitions. [2020-10-12 10:18:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 10:18:45,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:45,443 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:45,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 10:18:45,443 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash 242237070, now seen corresponding path program 63 times [2020-10-12 10:18:45,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:45,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809688914] [2020-10-12 10:18:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 10:18:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:49,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:49,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:49,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-12 10:18:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:49,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:49,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 2 proven. 3969 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:50,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809688914] [2020-10-12 10:18:50,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:50,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 10:18:50,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218316433] [2020-10-12 10:18:50,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 10:18:50,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 10:18:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 10:18:50,017 INFO L87 Difference]: Start difference. First operand 463 states and 527 transitions. Second operand 67 states. [2020-10-12 10:18:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:52,670 INFO L93 Difference]: Finished difference Result 802 states and 932 transitions. [2020-10-12 10:18:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 10:18:52,670 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 148 [2020-10-12 10:18:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:52,672 INFO L225 Difference]: With dead ends: 802 [2020-10-12 10:18:52,673 INFO L226 Difference]: Without dead ends: 472 [2020-10-12 10:18:52,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 10:18:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-12 10:18:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2020-10-12 10:18:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-12 10:18:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 535 transitions. [2020-10-12 10:18:52,683 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 535 transitions. Word has length 148 [2020-10-12 10:18:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:52,683 INFO L479 AbstractCegarLoop]: Abstraction has 470 states and 535 transitions. [2020-10-12 10:18:52,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 10:18:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 535 transitions. [2020-10-12 10:18:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 10:18:52,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:52,684 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:52,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 10:18:52,685 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1843883248, now seen corresponding path program 64 times [2020-10-12 10:18:52,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:52,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309445455] [2020-10-12 10:18:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:52,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:54,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 10:18:54,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:57,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:57,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:57,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:57,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:57,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 10:18:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:18:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:57,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 2 proven. 4096 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:18:57,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309445455] [2020-10-12 10:18:57,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:57,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 10:18:57,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199630380] [2020-10-12 10:18:57,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 10:18:57,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 10:18:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:18:57,039 INFO L87 Difference]: Start difference. First operand 470 states and 535 transitions. Second operand 68 states. [2020-10-12 10:18:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:59,003 INFO L93 Difference]: Finished difference Result 814 states and 946 transitions. [2020-10-12 10:18:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 10:18:59,004 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 150 [2020-10-12 10:18:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:59,006 INFO L225 Difference]: With dead ends: 814 [2020-10-12 10:18:59,006 INFO L226 Difference]: Without dead ends: 479 [2020-10-12 10:18:59,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:18:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-12 10:18:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2020-10-12 10:18:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 10:18:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 543 transitions. [2020-10-12 10:18:59,016 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 543 transitions. Word has length 150 [2020-10-12 10:18:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:59,016 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 543 transitions. [2020-10-12 10:18:59,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 10:18:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 543 transitions. [2020-10-12 10:18:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 10:18:59,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:59,017 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:59,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 10:18:59,017 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -867398958, now seen corresponding path program 65 times [2020-10-12 10:18:59,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:59,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604737355] [2020-10-12 10:18:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:00,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:00,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 10:19:00,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-12 10:19:00,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:03,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:03,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-12 10:19:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:03,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 2 proven. 4225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:03,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604737355] [2020-10-12 10:19:03,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:03,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 10:19:03,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560804643] [2020-10-12 10:19:03,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 10:19:03,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 10:19:03,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:19:03,564 INFO L87 Difference]: Start difference. First operand 477 states and 543 transitions. Second operand 69 states. [2020-10-12 10:19:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:05,542 INFO L93 Difference]: Finished difference Result 826 states and 960 transitions. [2020-10-12 10:19:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 10:19:05,542 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 152 [2020-10-12 10:19:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:05,546 INFO L225 Difference]: With dead ends: 826 [2020-10-12 10:19:05,546 INFO L226 Difference]: Without dead ends: 486 [2020-10-12 10:19:05,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:19:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-12 10:19:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 484. [2020-10-12 10:19:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-12 10:19:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 551 transitions. [2020-10-12 10:19:05,557 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 551 transitions. Word has length 152 [2020-10-12 10:19:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:05,557 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 551 transitions. [2020-10-12 10:19:05,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 10:19:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 551 transitions. [2020-10-12 10:19:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 10:19:05,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:05,559 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:05,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 10:19:05,559 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 635549748, now seen corresponding path program 66 times [2020-10-12 10:19:05,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:05,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682332473] [2020-10-12 10:19:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:05,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:07,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1967 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-12 10:19:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:10,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:10,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-12 10:19:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:10,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:10,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:10,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 2 proven. 4356 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:10,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682332473] [2020-10-12 10:19:10,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:10,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 10:19:10,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824174653] [2020-10-12 10:19:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 10:19:10,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 10:19:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:19:10,238 INFO L87 Difference]: Start difference. First operand 484 states and 551 transitions. Second operand 70 states. [2020-10-12 10:19:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:12,035 INFO L93 Difference]: Finished difference Result 838 states and 974 transitions. [2020-10-12 10:19:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 10:19:12,036 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 154 [2020-10-12 10:19:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:12,039 INFO L225 Difference]: With dead ends: 838 [2020-10-12 10:19:12,040 INFO L226 Difference]: Without dead ends: 493 [2020-10-12 10:19:12,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:19:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-12 10:19:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 491. [2020-10-12 10:19:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-12 10:19:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 559 transitions. [2020-10-12 10:19:12,051 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 559 transitions. Word has length 154 [2020-10-12 10:19:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:12,051 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 559 transitions. [2020-10-12 10:19:12,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 10:19:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 559 transitions. [2020-10-12 10:19:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 10:19:12,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:12,053 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:12,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 10:19:12,053 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1860244758, now seen corresponding path program 67 times [2020-10-12 10:19:12,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:12,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321822682] [2020-10-12 10:19:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:12,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:14,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-12 10:19:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:16,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:16,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:16,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:16,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:16,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-12 10:19:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:16,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4493 backedges. 2 proven. 4489 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:16,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321822682] [2020-10-12 10:19:16,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:16,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 10:19:16,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036352142] [2020-10-12 10:19:16,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 10:19:16,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 10:19:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 10:19:16,983 INFO L87 Difference]: Start difference. First operand 491 states and 559 transitions. Second operand 71 states. [2020-10-12 10:19:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:19,383 INFO L93 Difference]: Finished difference Result 850 states and 988 transitions. [2020-10-12 10:19:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 10:19:19,383 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2020-10-12 10:19:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:19,385 INFO L225 Difference]: With dead ends: 850 [2020-10-12 10:19:19,386 INFO L226 Difference]: Without dead ends: 500 [2020-10-12 10:19:19,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 10:19:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-10-12 10:19:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 498. [2020-10-12 10:19:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-12 10:19:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 567 transitions. [2020-10-12 10:19:19,398 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 567 transitions. Word has length 156 [2020-10-12 10:19:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:19,398 INFO L479 AbstractCegarLoop]: Abstraction has 498 states and 567 transitions. [2020-10-12 10:19:19,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 10:19:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 567 transitions. [2020-10-12 10:19:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 10:19:19,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:19,399 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:19,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 10:19:19,400 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1971110264, now seen corresponding path program 68 times [2020-10-12 10:19:19,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:19,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019648414] [2020-10-12 10:19:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:19,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 10:19:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:24,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:24,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:24,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:24,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-10-12 10:19:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4628 backedges. 2 proven. 4624 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:24,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019648414] [2020-10-12 10:19:24,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:24,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 10:19:24,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103228816] [2020-10-12 10:19:24,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 10:19:24,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:24,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 10:19:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 10:19:24,388 INFO L87 Difference]: Start difference. First operand 498 states and 567 transitions. Second operand 72 states. [2020-10-12 10:19:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:26,465 INFO L93 Difference]: Finished difference Result 862 states and 1002 transitions. [2020-10-12 10:19:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 10:19:26,466 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 158 [2020-10-12 10:19:26,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:26,469 INFO L225 Difference]: With dead ends: 862 [2020-10-12 10:19:26,469 INFO L226 Difference]: Without dead ends: 507 [2020-10-12 10:19:26,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 10:19:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-12 10:19:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2020-10-12 10:19:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 10:19:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 575 transitions. [2020-10-12 10:19:26,479 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 575 transitions. Word has length 158 [2020-10-12 10:19:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:26,479 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 575 transitions. [2020-10-12 10:19:26,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 10:19:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 575 transitions. [2020-10-12 10:19:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 10:19:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:26,481 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:26,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 10:19:26,481 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1138679130, now seen corresponding path program 69 times [2020-10-12 10:19:26,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:26,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897372069] [2020-10-12 10:19:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:26,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:28,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:28,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 10:19:28,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:28,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2120 [2020-10-12 10:19:28,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:28,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 10:19:28,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:28,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-12 10:19:28,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:31,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:31,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:31,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:31,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-12 10:19:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:31,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 2 proven. 4761 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897372069] [2020-10-12 10:19:31,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:31,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 10:19:31,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188087551] [2020-10-12 10:19:31,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 10:19:31,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 10:19:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 10:19:31,614 INFO L87 Difference]: Start difference. First operand 505 states and 575 transitions. Second operand 73 states. [2020-10-12 10:19:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:34,066 INFO L93 Difference]: Finished difference Result 874 states and 1016 transitions. [2020-10-12 10:19:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 10:19:34,067 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 160 [2020-10-12 10:19:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:34,070 INFO L225 Difference]: With dead ends: 874 [2020-10-12 10:19:34,070 INFO L226 Difference]: Without dead ends: 514 [2020-10-12 10:19:34,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 10:19:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-12 10:19:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2020-10-12 10:19:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-10-12 10:19:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 583 transitions. [2020-10-12 10:19:34,080 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 583 transitions. Word has length 160 [2020-10-12 10:19:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:34,080 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 583 transitions. [2020-10-12 10:19:34,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 10:19:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 583 transitions. [2020-10-12 10:19:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 10:19:34,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:34,082 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:34,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 10:19:34,082 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash 36276412, now seen corresponding path program 70 times [2020-10-12 10:19:34,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:34,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455009669] [2020-10-12 10:19:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:36,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:36,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 10:19:36,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-12 10:19:36,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 10:19:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 10:19:36,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:39,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:39,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:39,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:39,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-12 10:19:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:39,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 2 proven. 4900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:39,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455009669] [2020-10-12 10:19:39,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:39,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 10:19:39,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656666082] [2020-10-12 10:19:39,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 10:19:39,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 10:19:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 10:19:39,531 INFO L87 Difference]: Start difference. First operand 512 states and 583 transitions. Second operand 74 states. [2020-10-12 10:19:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:42,103 INFO L93 Difference]: Finished difference Result 886 states and 1030 transitions. [2020-10-12 10:19:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 10:19:42,104 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 162 [2020-10-12 10:19:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:42,106 INFO L225 Difference]: With dead ends: 886 [2020-10-12 10:19:42,106 INFO L226 Difference]: Without dead ends: 521 [2020-10-12 10:19:42,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 10:19:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-12 10:19:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 519. [2020-10-12 10:19:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-12 10:19:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 591 transitions. [2020-10-12 10:19:42,116 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 591 transitions. Word has length 162 [2020-10-12 10:19:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:42,117 INFO L479 AbstractCegarLoop]: Abstraction has 519 states and 591 transitions. [2020-10-12 10:19:42,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 10:19:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 591 transitions. [2020-10-12 10:19:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 10:19:42,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:42,118 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:42,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 10:19:42,118 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1484186526, now seen corresponding path program 71 times [2020-10-12 10:19:42,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:42,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180750312] [2020-10-12 10:19:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:42,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:44,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:44,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 10:19:44,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:44,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2639 [2020-10-12 10:19:44,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 10:19:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-12 10:19:44,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:48,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:48,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:48,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:48,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-12 10:19:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:48,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:48,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:19:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5045 backedges. 2 proven. 5041 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:48,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180750312] [2020-10-12 10:19:48,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:48,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 10:19:48,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037630409] [2020-10-12 10:19:48,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 10:19:48,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 10:19:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 10:19:48,028 INFO L87 Difference]: Start difference. First operand 519 states and 591 transitions. Second operand 75 states. [2020-10-12 10:19:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:50,511 INFO L93 Difference]: Finished difference Result 898 states and 1044 transitions. [2020-10-12 10:19:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 10:19:50,512 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 164 [2020-10-12 10:19:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:50,515 INFO L225 Difference]: With dead ends: 898 [2020-10-12 10:19:50,515 INFO L226 Difference]: Without dead ends: 528 [2020-10-12 10:19:50,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 10:19:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-12 10:19:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 526. [2020-10-12 10:19:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-10-12 10:19:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 599 transitions. [2020-10-12 10:19:50,528 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 599 transitions. Word has length 164 [2020-10-12 10:19:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:50,528 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 599 transitions. [2020-10-12 10:19:50,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 10:19:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 599 transitions. [2020-10-12 10:19:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 10:19:50,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:50,530 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:50,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 10:19:50,530 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1356402176, now seen corresponding path program 72 times [2020-10-12 10:19:50,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:50,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745451112] [2020-10-12 10:19:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:50,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking...