/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/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:06:38,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:06:38,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:06:38,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:06:38,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:06:38,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:06:38,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:06:38,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:06:38,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:06:38,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:06:38,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:06:38,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:06:39,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:06:39,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:06:39,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:06:39,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:06:39,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:06:39,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:06:39,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:06:39,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:06:39,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:06:39,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:06:39,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:06:39,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:06:39,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:06:39,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:06:39,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:06:39,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:06:39,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:06:39,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:06:39,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:06:39,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:06:39,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:06:39,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:06:39,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:06:39,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:06:39,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:06:39,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:06:39,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:06:39,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:06:39,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:06:39,055 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 16:06:39,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:06:39,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:06:39,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:06:39,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:06:39,092 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:06:39,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:06:39,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:06:39,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:06:39,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:06:39,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:06:39,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:06:39,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:06:39,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:06:39,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:06:39,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:06:39,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:06:39,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:06:39,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:06:39,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:06:39,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:06:39,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:06:39,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:06:39,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:06:39,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:06:39,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:06:39,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:06:39,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:06:39,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:06:39,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:06:39,099 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 16:06:39,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:06:39,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:06:39,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:06:39,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:06:39,425 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:06:39,425 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-12 16:06:39,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8072023b3/bd13495e0229427fbbc53f2b57058f8d/FLAGac83051dc [2020-10-12 16:06:39,914 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:06:39,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-12 16:06:39,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8072023b3/bd13495e0229427fbbc53f2b57058f8d/FLAGac83051dc [2020-10-12 16:06:40,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8072023b3/bd13495e0229427fbbc53f2b57058f8d [2020-10-12 16:06:40,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:06:40,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:06:40,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:40,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:06:40,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:06:40,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b8030e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40, skipping insertion in model container [2020-10-12 16:06:40,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:06:40,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:06:40,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:40,560 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:06:40,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:40,592 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:06:40,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40 WrapperNode [2020-10-12 16:06:40,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:40,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:06:40,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:06:40,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:06:40,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (1/1) ... [2020-10-12 16:06:40,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:06:40,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:06:40,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:06:40,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:06:40,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (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 16:06:40,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:06:40,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:06:40,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:06:40,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:06:40,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:06:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:06:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:06:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:06:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:06:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:06:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:06:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:06:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:06:41,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:06:41,045 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:06:41,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:41 BoogieIcfgContainer [2020-10-12 16:06:41,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:06:41,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:06:41,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:06:41,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:06:41,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:06:40" (1/3) ... [2020-10-12 16:06:41,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12037a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:41, skipping insertion in model container [2020-10-12 16:06:41,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:40" (2/3) ... [2020-10-12 16:06:41,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12037a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:41, skipping insertion in model container [2020-10-12 16:06:41,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:41" (3/3) ... [2020-10-12 16:06:41,085 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-12 16:06:41,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:06:41,110 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:06:41,124 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:06:41,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:06:41,149 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:06:41,149 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:06:41,149 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:06:41,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:06:41,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:06:41,150 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:06:41,150 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:06:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 16:06:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:06:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:41,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:41,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash -516899263, now seen corresponding path program 1 times [2020-10-12 16:06:41,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:41,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778452717] [2020-10-12 16:06:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:41,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:06:41,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:06:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 16:06:41,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:41,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:06:41,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:06:41,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:06:41,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 16:06:41,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:41,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:41,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:06:41,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:41,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:41,577 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 16:06:41,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778452717] [2020-10-12 16:06:41,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:06:41,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:06:41,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332078877] [2020-10-12 16:06:41,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:06:41,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:06:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:06:41,604 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-12 16:06:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:41,709 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-10-12 16:06:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:06:41,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 16:06:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:41,720 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:06:41,720 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:06:41,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:06:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-12 16:06:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:06:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-12 16:06:41,760 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-10-12 16:06:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:41,761 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-12 16:06:41,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:06:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-12 16:06:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:06:41,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:41,763 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:41,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:06:41,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2007463969, now seen corresponding path program 1 times [2020-10-12 16:06:41,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:41,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937438354] [2020-10-12 16:06:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:06:42,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-12 16:06:42,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:06:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:06:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:42,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:42,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:42,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:42,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:42,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:42,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937438354] [2020-10-12 16:06:42,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:42,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:06:42,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951508373] [2020-10-12 16:06:42,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:06:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:06:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:42,092 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-12 16:06:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:42,154 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-12 16:06:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:06:42,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:06:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:42,156 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:06:42,156 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:06:42,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:06:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:06:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-10-12 16:06:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:06:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 16:06:42,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-12 16:06:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:42,164 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 16:06:42,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:06:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 16:06:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:06:42,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:42,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:42,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:06:42,165 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 407428156, now seen corresponding path program 2 times [2020-10-12 16:06:42,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:42,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963763172] [2020-10-12 16:06:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:06:42,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:42,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 16:06:42,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:06:42,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:42,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:06:42,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:42,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963763172] [2020-10-12 16:06:42,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:42,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:06:42,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747488771] [2020-10-12 16:06:42,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:06:42,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:06:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:06:42,348 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-12 16:06:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:42,411 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-12 16:06:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:06:42,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 16:06:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:42,415 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:06:42,415 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:06:42,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:06:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-12 16:06:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:06:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 16:06:42,422 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2020-10-12 16:06:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:42,422 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 16:06:42,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:06:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 16:06:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:06:42,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:42,424 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:42,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:06:42,424 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash 371303831, now seen corresponding path program 3 times [2020-10-12 16:06:42,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:42,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620453107] [2020-10-12 16:06:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:06:42,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:42,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-12 16:06:42,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:06:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:06:42,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:42,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:42,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620453107] [2020-10-12 16:06:42,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:42,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:06:42,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766659185] [2020-10-12 16:06:42,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:06:42,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:06:42,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:42,604 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-12 16:06:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:42,672 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-12 16:06:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:06:42,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 16:06:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:42,674 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:06:42,674 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:06:42,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:06:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:06:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-12 16:06:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:06:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-12 16:06:42,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-12 16:06:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:42,680 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-12 16:06:42,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:06:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-12 16:06:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:06:42,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:42,682 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:42,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:06:42,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 15565874, now seen corresponding path program 4 times [2020-10-12 16:06:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:42,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330247324] [2020-10-12 16:06:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:06:42,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:42,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:06:42,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:06:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:06:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:42,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:42,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:42,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:42,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:42,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330247324] [2020-10-12 16:06:42,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:42,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:06:42,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284442079] [2020-10-12 16:06:42,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:06:42,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:42,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:06:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:06:42,840 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-12 16:06:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:42,919 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-12 16:06:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:06:42,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 16:06:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:42,921 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:06:42,921 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:06:42,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:06:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-12 16:06:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:06:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-12 16:06:42,928 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2020-10-12 16:06:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:42,929 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-12 16:06:42,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:06:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-12 16:06:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:06:42,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:42,930 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:42,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:06:42,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1748772877, now seen corresponding path program 5 times [2020-10-12 16:06:42,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:42,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142763825] [2020-10-12 16:06:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:42,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:06:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-12 16:06:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:06:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:06:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:43,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:43,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:43,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:43,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142763825] [2020-10-12 16:06:43,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:43,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:06:43,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603786050] [2020-10-12 16:06:43,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:06:43,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:06:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:43,158 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 10 states. [2020-10-12 16:06:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:43,262 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-12 16:06:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:06:43,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 16:06:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:43,264 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:06:43,264 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:06:43,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:06:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:06:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 29. [2020-10-12 16:06:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:06:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-12 16:06:43,270 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-12 16:06:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:43,270 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-12 16:06:43,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:06:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-12 16:06:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:06:43,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:43,272 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:43,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:06:43,272 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 913391912, now seen corresponding path program 6 times [2020-10-12 16:06:43,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:43,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466333630] [2020-10-12 16:06:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:06:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 16:06:43,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:06:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:06:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:43,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:43,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:43,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:43,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466333630] [2020-10-12 16:06:43,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:43,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:06:43,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166051165] [2020-10-12 16:06:43,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:06:43,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:06:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:06:43,538 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-12 16:06:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:43,625 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-12 16:06:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:06:43,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:06:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:43,627 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:06:43,627 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:06:43,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:06:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:06:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2020-10-12 16:06:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:06:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-12 16:06:43,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-12 16:06:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:43,633 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-12 16:06:43,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:06:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-12 16:06:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:06:43,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:43,634 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:43,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:06:43,634 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1271168899, now seen corresponding path program 7 times [2020-10-12 16:06:43,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:43,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172426810] [2020-10-12 16:06:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:43,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:06:43,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:43,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-12 16:06:43,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:06:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:06:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:43,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:43,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:43,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172426810] [2020-10-12 16:06:43,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:43,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:06:43,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676950305] [2020-10-12 16:06:43,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:06:43,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:06:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:06:43,977 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-12 16:06:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:44,069 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-12 16:06:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:06:44,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 16:06:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:44,071 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:06:44,071 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:06:44,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:06:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:06:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2020-10-12 16:06:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:06:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-12 16:06:44,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-12 16:06:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:44,076 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-12 16:06:44,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:06:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-12 16:06:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:06:44,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:44,077 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:44,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:06:44,078 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1497469726, now seen corresponding path program 8 times [2020-10-12 16:06:44,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:44,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460436172] [2020-10-12 16:06:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:44,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:44,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:06:44,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:44,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-12 16:06:44,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:06:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:06:44,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:44,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:44,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:44,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:44,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:44,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:44,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460436172] [2020-10-12 16:06:44,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:44,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:06:44,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324996650] [2020-10-12 16:06:44,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:06:44,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:06:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:06:44,375 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-12 16:06:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:44,494 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2020-10-12 16:06:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:06:44,494 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 16:06:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:44,496 INFO L225 Difference]: With dead ends: 156 [2020-10-12 16:06:44,496 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 16:06:44,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:06:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 16:06:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 38. [2020-10-12 16:06:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:06:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 16:06:44,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-10-12 16:06:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:44,504 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 16:06:44,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:06:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 16:06:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:06:44,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:44,505 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:44,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:06:44,505 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -70767623, now seen corresponding path program 9 times [2020-10-12 16:06:44,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:44,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544883331] [2020-10-12 16:06:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:44,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:44,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:06:44,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:44,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-12 16:06:44,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:06:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:06:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:44,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:44,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:44,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:44,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:44,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:44,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:44,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:44,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544883331] [2020-10-12 16:06:44,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:44,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:06:44,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130225808] [2020-10-12 16:06:44,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:06:44,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:06:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:06:44,894 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-10-12 16:06:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:44,994 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-12 16:06:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:06:44,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 16:06:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:44,995 INFO L225 Difference]: With dead ends: 161 [2020-10-12 16:06:44,996 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 16:06:44,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:06:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 16:06:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 43. [2020-10-12 16:06:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:06:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-12 16:06:45,001 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 34 [2020-10-12 16:06:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:45,002 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-12 16:06:45,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:06:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-12 16:06:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:06:45,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:45,003 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:45,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:06:45,003 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:45,004 INFO L82 PathProgramCache]: Analyzing trace with hash 386660884, now seen corresponding path program 10 times [2020-10-12 16:06:45,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:45,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172089578] [2020-10-12 16:06:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:45,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:45,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:45,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:06:45,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-12 16:06:45,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:45,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:06:45,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:45,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:06:45,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:45,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:45,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:45,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:45,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:45,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:45,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:45,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:45,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172089578] [2020-10-12 16:06:45,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:45,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:06:45,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407326427] [2020-10-12 16:06:45,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:06:45,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:06:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:06:45,492 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 15 states. [2020-10-12 16:06:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:45,620 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-12 16:06:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:06:45,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 16:06:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:45,622 INFO L225 Difference]: With dead ends: 120 [2020-10-12 16:06:45,622 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 16:06:45,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:06:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 16:06:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 39. [2020-10-12 16:06:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:06:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-12 16:06:45,627 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-12 16:06:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:45,627 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-12 16:06:45,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:06:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-12 16:06:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:06:45,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:45,628 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:45,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:06:45,629 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1888791919, now seen corresponding path program 11 times [2020-10-12 16:06:45,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:45,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137083413] [2020-10-12 16:06:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:45,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:06:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-12 16:06:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:06:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:06:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:46,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:46,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:46,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:46,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:46,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:46,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:46,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137083413] [2020-10-12 16:06:46,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:46,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:06:46,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407092972] [2020-10-12 16:06:46,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:06:46,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:06:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:06:46,150 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-12 16:06:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:46,267 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-12 16:06:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:06:46,268 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 16:06:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:46,269 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:06:46,269 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:06:46,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:06:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:06:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2020-10-12 16:06:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:06:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-12 16:06:46,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-12 16:06:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:46,277 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-12 16:06:46,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:06:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-12 16:06:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:06:46,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:46,282 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:46,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:06:46,283 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1967262198, now seen corresponding path program 12 times [2020-10-12 16:06:46,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:46,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212957705] [2020-10-12 16:06:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:46,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:46,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:46,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:06:46,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:46,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-12 16:06:46,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:06:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:06:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:06:46,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:46,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:46,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:46,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:46,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:46,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:46,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:46,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:46,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212957705] [2020-10-12 16:06:46,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:46,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:06:46,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807820273] [2020-10-12 16:06:46,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:06:46,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:06:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:06:46,981 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-12 16:06:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:47,115 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-12 16:06:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:06:47,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-12 16:06:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:47,118 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:06:47,118 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:06:47,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:06:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:06:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2020-10-12 16:06:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:06:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-12 16:06:47,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-12 16:06:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:47,123 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-12 16:06:47,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:06:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-12 16:06:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:06:47,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:47,124 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:47,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:06:47,124 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1078492187, now seen corresponding path program 13 times [2020-10-12 16:06:47,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:47,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446520542] [2020-10-12 16:06:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:47,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:47,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:47,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:47,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:06:47,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-12 16:06:47,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:06:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:06:47,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:47,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:47,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:47,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:06:47,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:47,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:47,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446520542] [2020-10-12 16:06:47,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:47,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:06:47,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931285431] [2020-10-12 16:06:47,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:06:47,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:06:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:06:47,893 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-12 16:06:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:48,038 INFO L93 Difference]: Finished difference Result 299 states and 314 transitions. [2020-10-12 16:06:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:06:48,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 16:06:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:48,041 INFO L225 Difference]: With dead ends: 299 [2020-10-12 16:06:48,041 INFO L226 Difference]: Without dead ends: 293 [2020-10-12 16:06:48,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:06:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-12 16:06:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 48. [2020-10-12 16:06:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:06:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 16:06:48,050 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2020-10-12 16:06:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:48,050 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 16:06:48,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:06:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 16:06:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:06:48,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:48,051 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:48,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:06:48,052 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1669003520, now seen corresponding path program 14 times [2020-10-12 16:06:48,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:48,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632233449] [2020-10-12 16:06:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:48,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:48,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:06:48,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:48,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-12 16:06:48,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:06:48,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:48,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:48,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:48,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:48,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:48,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:48,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632233449] [2020-10-12 16:06:48,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:48,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:06:48,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125615350] [2020-10-12 16:06:48,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:06:48,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:06:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:06:48,799 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-12 16:06:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:48,943 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-10-12 16:06:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:06:48,943 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-12 16:06:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:48,944 INFO L225 Difference]: With dead ends: 128 [2020-10-12 16:06:48,944 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 16:06:48,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:06:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 16:06:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 47. [2020-10-12 16:06:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:06:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-12 16:06:48,948 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-12 16:06:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:48,949 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-12 16:06:48,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:06:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-12 16:06:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:06:48,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:48,950 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:48,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:06:48,950 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2080255835, now seen corresponding path program 15 times [2020-10-12 16:06:48,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:48,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543785721] [2020-10-12 16:06:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:48,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:06:49,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-12 16:06:49,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:06:49,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:06:49,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:49,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:49,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:49,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:49,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543785721] [2020-10-12 16:06:49,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:49,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:06:49,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614798100] [2020-10-12 16:06:49,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:06:49,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:49,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:06:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:06:49,672 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-12 16:06:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:49,830 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-12 16:06:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:06:49,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-12 16:06:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:49,832 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:06:49,832 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:06:49,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:06:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:06:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2020-10-12 16:06:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:06:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-12 16:06:49,838 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-12 16:06:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:49,838 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-12 16:06:49,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:06:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-12 16:06:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:06:49,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:49,839 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:49,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:06:49,839 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1640934646, now seen corresponding path program 16 times [2020-10-12 16:06:49,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:49,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39663366] [2020-10-12 16:06:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:50,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:06:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:50,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:50,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:50,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39663366] [2020-10-12 16:06:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:06:50,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127331259] [2020-10-12 16:06:50,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:06:50,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:06:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:06:50,835 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-12 16:06:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:51,002 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-12 16:06:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:06:51,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-12 16:06:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:51,003 INFO L225 Difference]: With dead ends: 108 [2020-10-12 16:06:51,003 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 16:06:51,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:06:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 16:06:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2020-10-12 16:06:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:06:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-12 16:06:51,008 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-12 16:06:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:51,009 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-12 16:06:51,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:06:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-12 16:06:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:06:51,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:51,010 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:51,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:06:51,010 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash 360067025, now seen corresponding path program 17 times [2020-10-12 16:06:51,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:51,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424969911] [2020-10-12 16:06:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:06:51,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:51,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-12 16:06:51,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:06:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:06:51,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:51,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:51,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:51,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:51,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:51,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424969911] [2020-10-12 16:06:51,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:51,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:06:51,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028109764] [2020-10-12 16:06:51,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:06:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:06:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:06:51,874 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-12 16:06:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:52,030 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-10-12 16:06:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:06:52,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 16:06:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:52,032 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:06:52,032 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 16:06:52,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:06:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 16:06:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 53. [2020-10-12 16:06:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:06:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-12 16:06:52,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-12 16:06:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:52,045 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-12 16:06:52,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:06:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-12 16:06:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:06:52,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:52,048 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:52,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:06:52,048 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2101897196, now seen corresponding path program 18 times [2020-10-12 16:06:52,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:52,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628207041] [2020-10-12 16:06:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:52,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:52,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:06:52,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-12 16:06:52,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:06:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:06:52,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:53,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:53,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:53,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:53,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:53,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628207041] [2020-10-12 16:06:53,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:53,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:06:53,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098821682] [2020-10-12 16:06:53,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:06:53,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:06:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:06:53,026 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-12 16:06:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:53,194 INFO L93 Difference]: Finished difference Result 496 states and 516 transitions. [2020-10-12 16:06:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:06:53,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-12 16:06:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:53,198 INFO L225 Difference]: With dead ends: 496 [2020-10-12 16:06:53,198 INFO L226 Difference]: Without dead ends: 490 [2020-10-12 16:06:53,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:06:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-12 16:06:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 58. [2020-10-12 16:06:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:06:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 16:06:53,207 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2020-10-12 16:06:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:53,208 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 16:06:53,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:06:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 16:06:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:06:53,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:53,209 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:53,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:06:53,209 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:53,209 INFO L82 PathProgramCache]: Analyzing trace with hash 963446087, now seen corresponding path program 19 times [2020-10-12 16:06:53,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:53,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219183743] [2020-10-12 16:06:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:53,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:06:53,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:53,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 16:06:53,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:06:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:53,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:06:53,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:54,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:54,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:54,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:54,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:54,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219183743] [2020-10-12 16:06:54,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:54,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:06:54,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390606064] [2020-10-12 16:06:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:06:54,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:06:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:06:54,059 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 24 states. [2020-10-12 16:06:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:54,220 INFO L93 Difference]: Finished difference Result 501 states and 522 transitions. [2020-10-12 16:06:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:06:54,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-12 16:06:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:54,224 INFO L225 Difference]: With dead ends: 501 [2020-10-12 16:06:54,224 INFO L226 Difference]: Without dead ends: 495 [2020-10-12 16:06:54,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:06:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-12 16:06:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 63. [2020-10-12 16:06:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:06:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-12 16:06:54,230 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2020-10-12 16:06:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:54,230 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-12 16:06:54,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:06:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-12 16:06:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:06:54,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:54,231 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:54,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:06:54,231 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:54,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2128590818, now seen corresponding path program 20 times [2020-10-12 16:06:54,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:54,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546219358] [2020-10-12 16:06:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:55,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:55,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:06:55,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:55,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-12 16:06:55,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:55,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:06:55,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:55,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:06:55,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:55,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:55,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:55,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:55,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:55,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:55,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:55,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:55,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546219358] [2020-10-12 16:06:55,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:55,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:06:55,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835127630] [2020-10-12 16:06:55,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:06:55,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:55,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:06:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:06:55,360 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 25 states. [2020-10-12 16:06:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:55,532 INFO L93 Difference]: Finished difference Result 506 states and 528 transitions. [2020-10-12 16:06:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:06:55,533 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-12 16:06:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:55,535 INFO L225 Difference]: With dead ends: 506 [2020-10-12 16:06:55,535 INFO L226 Difference]: Without dead ends: 500 [2020-10-12 16:06:55,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:06:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-10-12 16:06:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 68. [2020-10-12 16:06:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:06:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-12 16:06:55,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-12 16:06:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:55,542 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-12 16:06:55,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:06:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-12 16:06:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:06:55,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:55,549 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:55,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:06:55,550 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash 846213053, now seen corresponding path program 21 times [2020-10-12 16:06:55,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:55,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213768891] [2020-10-12 16:06:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:55,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:56,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:56,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:06:56,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:56,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-12 16:06:56,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:06:56,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:06:56,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:06:56,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:56,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:56,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:56,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:56,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:56,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:56,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:56,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:56,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:56,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:56,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213768891] [2020-10-12 16:06:56,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:56,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:06:56,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554281955] [2020-10-12 16:06:56,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:06:56,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:06:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:06:56,947 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 26 states. [2020-10-12 16:06:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:57,240 INFO L93 Difference]: Finished difference Result 259 states and 285 transitions. [2020-10-12 16:06:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:06:57,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-12 16:06:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:57,243 INFO L225 Difference]: With dead ends: 259 [2020-10-12 16:06:57,244 INFO L226 Difference]: Without dead ends: 247 [2020-10-12 16:06:57,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:06:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-12 16:06:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 61. [2020-10-12 16:06:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:06:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-12 16:06:57,250 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-12 16:06:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:57,250 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-12 16:06:57,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:06:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-12 16:06:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:06:57,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:57,251 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:57,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:06:57,251 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1136794840, now seen corresponding path program 22 times [2020-10-12 16:06:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:57,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644041917] [2020-10-12 16:06:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:57,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:57,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:58,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:58,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:06:58,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:06:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:58,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:58,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:58,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:58,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:58,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644041917] [2020-10-12 16:06:58,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:58,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:06:58,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630926552] [2020-10-12 16:06:58,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:06:58,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:06:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:06:58,588 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-12 16:06:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:58,833 INFO L93 Difference]: Finished difference Result 688 states and 712 transitions. [2020-10-12 16:06:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:06:58,833 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-12 16:06:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:58,836 INFO L225 Difference]: With dead ends: 688 [2020-10-12 16:06:58,836 INFO L226 Difference]: Without dead ends: 682 [2020-10-12 16:06:58,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:06:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-10-12 16:06:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 66. [2020-10-12 16:06:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:06:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 16:06:58,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2020-10-12 16:06:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:58,842 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 16:06:58,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:06:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 16:06:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:06:58,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:58,843 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:58,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:06:58,844 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1213017907, now seen corresponding path program 23 times [2020-10-12 16:06:58,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:58,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631328414] [2020-10-12 16:06:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:58,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:59,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:59,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:06:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:06:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:06:59,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:59,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:59,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:59,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:59,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:59,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:59,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:59,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631328414] [2020-10-12 16:06:59,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:06:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267442400] [2020-10-12 16:06:59,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:06:59,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:06:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:06:59,705 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 28 states. [2020-10-12 16:06:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:59,949 INFO L93 Difference]: Finished difference Result 693 states and 718 transitions. [2020-10-12 16:06:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:06:59,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-12 16:06:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:59,954 INFO L225 Difference]: With dead ends: 693 [2020-10-12 16:06:59,954 INFO L226 Difference]: Without dead ends: 687 [2020-10-12 16:06:59,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:06:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-12 16:06:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 71. [2020-10-12 16:06:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:06:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-12 16:06:59,961 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2020-10-12 16:06:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:59,962 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-12 16:06:59,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:06:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-12 16:06:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:06:59,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:59,963 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:59,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:06:59,963 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:59,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1448941262, now seen corresponding path program 24 times [2020-10-12 16:06:59,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:59,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40481879] [2020-10-12 16:06:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:59,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:01,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:01,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:07:01,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:01,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-12 16:07:01,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:07:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:07:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:01,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:01,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:01,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:01,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:01,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40481879] [2020-10-12 16:07:01,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:01,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:07:01,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992749955] [2020-10-12 16:07:01,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:07:01,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:07:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:07:01,522 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 29 states. [2020-10-12 16:07:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:01,773 INFO L93 Difference]: Finished difference Result 246 states and 274 transitions. [2020-10-12 16:07:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:07:01,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-12 16:07:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:01,776 INFO L225 Difference]: With dead ends: 246 [2020-10-12 16:07:01,777 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 16:07:01,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:07:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 16:07:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 67. [2020-10-12 16:07:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:07:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-12 16:07:01,781 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-12 16:07:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:01,782 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-12 16:07:01,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:07:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-12 16:07:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:07:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:01,783 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:01,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:07:01,783 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:01,783 INFO L82 PathProgramCache]: Analyzing trace with hash 538018729, now seen corresponding path program 25 times [2020-10-12 16:07:01,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:01,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175720160] [2020-10-12 16:07:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:01,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:02,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:02,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:07:02,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:02,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-12 16:07:02,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:07:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:07:02,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:03,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:03,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:03,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:03,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:03,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:03,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:03,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175720160] [2020-10-12 16:07:03,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:03,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:07:03,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918030734] [2020-10-12 16:07:03,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:07:03,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:07:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:07:03,025 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-12 16:07:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:03,355 INFO L93 Difference]: Finished difference Result 851 states and 878 transitions. [2020-10-12 16:07:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:07:03,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-12 16:07:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:03,361 INFO L225 Difference]: With dead ends: 851 [2020-10-12 16:07:03,361 INFO L226 Difference]: Without dead ends: 845 [2020-10-12 16:07:03,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:07:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-10-12 16:07:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 72. [2020-10-12 16:07:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:07:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 16:07:03,373 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 66 [2020-10-12 16:07:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:03,373 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 16:07:03,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:07:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 16:07:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:07:03,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:03,375 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:03,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:07:03,375 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1314792900, now seen corresponding path program 26 times [2020-10-12 16:07:03,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:03,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555216190] [2020-10-12 16:07:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:03,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:04,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:07:04,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:04,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:04,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:04,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:04,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:04,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:04,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:04,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:04,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:04,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555216190] [2020-10-12 16:07:04,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:04,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:07:04,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655165474] [2020-10-12 16:07:04,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:07:04,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:07:04,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:07:04,697 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2020-10-12 16:07:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:04,960 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2020-10-12 16:07:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:07:04,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-12 16:07:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:04,962 INFO L225 Difference]: With dead ends: 212 [2020-10-12 16:07:04,962 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 16:07:04,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:07:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 16:07:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 71. [2020-10-12 16:07:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:07:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-12 16:07:04,966 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-12 16:07:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:04,966 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-12 16:07:04,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:07:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-12 16:07:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:07:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:04,967 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:04,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:07:04,968 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash 470461727, now seen corresponding path program 27 times [2020-10-12 16:07:04,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:04,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518590943] [2020-10-12 16:07:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:04,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:05,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:05,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:07:05,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:05,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-12 16:07:05,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:05,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:07:05,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:05,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:07:05,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:06,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:06,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:06,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:06,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:06,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:06,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518590943] [2020-10-12 16:07:06,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:06,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:07:06,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614745722] [2020-10-12 16:07:06,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:07:06,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:07:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:07:06,108 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-12 16:07:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:06,430 INFO L93 Difference]: Finished difference Result 973 states and 1002 transitions. [2020-10-12 16:07:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:07:06,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-12 16:07:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:06,437 INFO L225 Difference]: With dead ends: 973 [2020-10-12 16:07:06,437 INFO L226 Difference]: Without dead ends: 967 [2020-10-12 16:07:06,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:07:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-12 16:07:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 76. [2020-10-12 16:07:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:07:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 16:07:06,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 70 [2020-10-12 16:07:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:06,450 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 16:07:06,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:07:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 16:07:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:07:06,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:06,452 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:06,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:07:06,453 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash 817023418, now seen corresponding path program 28 times [2020-10-12 16:07:06,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:06,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839746654] [2020-10-12 16:07:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:07:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-12 16:07:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:07:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:07,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:07,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:07,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:07,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:07,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:07,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:07,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839746654] [2020-10-12 16:07:07,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:07,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:07:07,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575236346] [2020-10-12 16:07:07,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:07:07,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:07:07,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:07:07,826 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 33 states. [2020-10-12 16:07:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:08,199 INFO L93 Difference]: Finished difference Result 226 states and 257 transitions. [2020-10-12 16:07:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:07:08,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-12 16:07:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:08,201 INFO L225 Difference]: With dead ends: 226 [2020-10-12 16:07:08,201 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 16:07:08,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:07:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 16:07:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 75. [2020-10-12 16:07:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:07:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-12 16:07:08,207 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-12 16:07:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:08,207 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-12 16:07:08,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:07:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-12 16:07:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:07:08,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:08,209 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:08,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:07:08,209 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1144640619, now seen corresponding path program 29 times [2020-10-12 16:07:08,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:08,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639234362] [2020-10-12 16:07:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:09,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1407 [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:07:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:07:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:10,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:10,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:10,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:10,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:10,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:10,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639234362] [2020-10-12 16:07:10,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:10,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:07:10,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763029026] [2020-10-12 16:07:10,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:07:10,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:07:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:07:10,242 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-12 16:07:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:10,688 INFO L93 Difference]: Finished difference Result 1101 states and 1132 transitions. [2020-10-12 16:07:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:07:10,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-12 16:07:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:10,696 INFO L225 Difference]: With dead ends: 1101 [2020-10-12 16:07:10,696 INFO L226 Difference]: Without dead ends: 1095 [2020-10-12 16:07:10,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:07:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2020-10-12 16:07:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 80. [2020-10-12 16:07:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:07:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 16:07:10,718 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2020-10-12 16:07:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:10,718 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 16:07:10,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:07:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 16:07:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:07:10,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:10,720 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:10,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:07:10,720 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash -813137232, now seen corresponding path program 30 times [2020-10-12 16:07:10,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:10,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87125186] [2020-10-12 16:07:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:11,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:07:11,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:11,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:07:11,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:12,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:12,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:12,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:12,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87125186] [2020-10-12 16:07:12,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:12,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:07:12,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491941251] [2020-10-12 16:07:12,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:07:12,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:12,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:07:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:07:12,127 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 35 states. [2020-10-12 16:07:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:12,431 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2020-10-12 16:07:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:07:12,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-12 16:07:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:12,433 INFO L225 Difference]: With dead ends: 240 [2020-10-12 16:07:12,433 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 16:07:12,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:07:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 16:07:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 79. [2020-10-12 16:07:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:07:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-12 16:07:12,437 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-12 16:07:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:12,438 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-12 16:07:12,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:07:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-12 16:07:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:07:12,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:12,439 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:12,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:07:12,439 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -65962229, now seen corresponding path program 31 times [2020-10-12 16:07:12,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:12,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164244986] [2020-10-12 16:07:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:13,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:13,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:07:13,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:13,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-12 16:07:13,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:13,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:07:13,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:13,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:07:13,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:13,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:13,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164244986] [2020-10-12 16:07:13,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:13,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:07:13,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101327226] [2020-10-12 16:07:13,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:07:13,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:07:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:07:13,829 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-12 16:07:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:14,130 INFO L93 Difference]: Finished difference Result 1237 states and 1270 transitions. [2020-10-12 16:07:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:07:14,131 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-12 16:07:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:14,137 INFO L225 Difference]: With dead ends: 1237 [2020-10-12 16:07:14,137 INFO L226 Difference]: Without dead ends: 1231 [2020-10-12 16:07:14,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:07:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2020-10-12 16:07:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 84. [2020-10-12 16:07:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:07:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-12 16:07:14,150 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 78 [2020-10-12 16:07:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:14,150 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-12 16:07:14,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:07:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-12 16:07:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:07:14,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:14,151 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:14,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:07:14,152 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 709677222, now seen corresponding path program 32 times [2020-10-12 16:07:14,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:14,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213341701] [2020-10-12 16:07:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:14,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:14,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:14,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:07:14,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:15,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:15,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213341701] [2020-10-12 16:07:15,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:15,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:07:15,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378798600] [2020-10-12 16:07:15,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:07:15,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:07:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:07:15,629 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 37 states. [2020-10-12 16:07:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:15,982 INFO L93 Difference]: Finished difference Result 254 states and 289 transitions. [2020-10-12 16:07:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:07:15,982 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-12 16:07:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:15,983 INFO L225 Difference]: With dead ends: 254 [2020-10-12 16:07:15,984 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 16:07:15,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:07:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 16:07:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 83. [2020-10-12 16:07:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:07:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-12 16:07:15,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-12 16:07:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:15,990 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-12 16:07:15,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:07:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-12 16:07:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:07:15,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:15,992 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:15,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:07:15,994 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:15,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1225119871, now seen corresponding path program 33 times [2020-10-12 16:07:15,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:15,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570337616] [2020-10-12 16:07:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:16,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:17,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:07:17,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:07:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:17,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:17,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:17,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:17,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:17,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570337616] [2020-10-12 16:07:17,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:17,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:07:17,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620950993] [2020-10-12 16:07:17,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:07:17,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:07:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:07:17,735 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-12 16:07:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:18,075 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2020-10-12 16:07:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:07:18,076 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-12 16:07:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:18,077 INFO L225 Difference]: With dead ends: 193 [2020-10-12 16:07:18,078 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 16:07:18,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:07:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 16:07:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2020-10-12 16:07:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:07:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-12 16:07:18,082 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-12 16:07:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:18,082 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-12 16:07:18,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:07:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-12 16:07:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:07:18,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:18,083 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:18,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:07:18,084 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -844287076, now seen corresponding path program 34 times [2020-10-12 16:07:18,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:18,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318960870] [2020-10-12 16:07:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:18,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:18,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:07:18,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:07:18,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:19,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:19,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:19,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:19,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:19,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318960870] [2020-10-12 16:07:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:19,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:07:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434925370] [2020-10-12 16:07:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:07:19,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:07:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:07:19,489 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-12 16:07:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:19,844 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2020-10-12 16:07:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:07:19,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-12 16:07:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:19,846 INFO L225 Difference]: With dead ends: 198 [2020-10-12 16:07:19,847 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 16:07:19,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:07:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 16:07:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 87. [2020-10-12 16:07:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:07:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-12 16:07:19,851 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-12 16:07:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:19,852 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-12 16:07:19,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:07:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-12 16:07:19,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:07:19,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:19,853 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:07:19,853 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 63808759, now seen corresponding path program 35 times [2020-10-12 16:07:19,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:19,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977385360] [2020-10-12 16:07:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:21,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:21,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1579 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:07:21,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:22,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:22,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:22,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:22,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:22,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:22,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977385360] [2020-10-12 16:07:22,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:22,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:07:22,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002095727] [2020-10-12 16:07:22,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:07:22,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:07:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:07:22,203 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-12 16:07:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:22,527 INFO L93 Difference]: Finished difference Result 1533 states and 1570 transitions. [2020-10-12 16:07:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:07:22,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-12 16:07:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:22,533 INFO L225 Difference]: With dead ends: 1533 [2020-10-12 16:07:22,534 INFO L226 Difference]: Without dead ends: 1527 [2020-10-12 16:07:22,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:07:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-10-12 16:07:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 92. [2020-10-12 16:07:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:07:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-12 16:07:22,543 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2020-10-12 16:07:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:22,544 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-12 16:07:22,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:07:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-12 16:07:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:07:22,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:22,545 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:22,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:07:22,545 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash 865545106, now seen corresponding path program 36 times [2020-10-12 16:07:22,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:22,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399204987] [2020-10-12 16:07:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:23,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:23,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:07:23,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:23,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-12 16:07:23,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:07:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:07:23,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:24,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:24,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:24,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:24,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:24,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:24,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399204987] [2020-10-12 16:07:24,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:24,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:07:24,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840025398] [2020-10-12 16:07:24,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:07:24,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:24,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:07:24,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:07:24,571 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 41 states. [2020-10-12 16:07:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:24,961 INFO L93 Difference]: Finished difference Result 282 states and 321 transitions. [2020-10-12 16:07:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:07:24,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-12 16:07:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:24,964 INFO L225 Difference]: With dead ends: 282 [2020-10-12 16:07:24,964 INFO L226 Difference]: Without dead ends: 274 [2020-10-12 16:07:24,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:07:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-12 16:07:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 91. [2020-10-12 16:07:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:07:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-12 16:07:24,970 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-12 16:07:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:24,970 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-12 16:07:24,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:07:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-12 16:07:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:07:24,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:24,972 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:24,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:07:24,972 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1759938707, now seen corresponding path program 37 times [2020-10-12 16:07:24,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:24,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124568504] [2020-10-12 16:07:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:25,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:26,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:26,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:07:26,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:26,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-10-12 16:07:26,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:26,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:07:26,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:26,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:07:26,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:27,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:27,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:27,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:27,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:27,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:27,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:27,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124568504] [2020-10-12 16:07:27,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:27,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:07:27,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782839929] [2020-10-12 16:07:27,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:07:27,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:27,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:07:27,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:07:27,291 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-12 16:07:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:27,716 INFO L93 Difference]: Finished difference Result 213 states and 252 transitions. [2020-10-12 16:07:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:07:27,717 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-12 16:07:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:27,718 INFO L225 Difference]: With dead ends: 213 [2020-10-12 16:07:27,718 INFO L226 Difference]: Without dead ends: 207 [2020-10-12 16:07:27,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:07:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-12 16:07:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 93. [2020-10-12 16:07:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:07:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-12 16:07:27,723 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-12 16:07:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:27,723 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-12 16:07:27,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:07:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-12 16:07:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:07:27,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:27,725 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:27,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:07:27,725 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash 590887048, now seen corresponding path program 38 times [2020-10-12 16:07:27,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:27,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985058263] [2020-10-12 16:07:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:28,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:28,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:28,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 16:07:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:29,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:29,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:29,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:29,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:29,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:29,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:29,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:29,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985058263] [2020-10-12 16:07:29,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:29,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:07:29,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951708391] [2020-10-12 16:07:29,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:07:29,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:07:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:07:29,829 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-12 16:07:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:30,179 INFO L93 Difference]: Finished difference Result 1776 states and 1816 transitions. [2020-10-12 16:07:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:07:30,180 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-12 16:07:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:30,187 INFO L225 Difference]: With dead ends: 1776 [2020-10-12 16:07:30,187 INFO L226 Difference]: Without dead ends: 1770 [2020-10-12 16:07:30,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:07:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2020-10-12 16:07:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 98. [2020-10-12 16:07:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:07:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-12 16:07:30,199 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 92 [2020-10-12 16:07:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:30,199 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-12 16:07:30,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:07:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-12 16:07:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:07:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:30,200 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:30,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:07:30,201 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:30,201 INFO L82 PathProgramCache]: Analyzing trace with hash 581639907, now seen corresponding path program 39 times [2020-10-12 16:07:30,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:30,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046853287] [2020-10-12 16:07:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:30,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:30,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:30,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:07:30,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 748 [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:07:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:31,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:31,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:31,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046853287] [2020-10-12 16:07:31,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:31,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:07:31,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734096903] [2020-10-12 16:07:31,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:07:31,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:07:31,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:07:31,876 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 44 states. [2020-10-12 16:07:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:32,233 INFO L93 Difference]: Finished difference Result 1781 states and 1822 transitions. [2020-10-12 16:07:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:07:32,234 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-12 16:07:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:32,241 INFO L225 Difference]: With dead ends: 1781 [2020-10-12 16:07:32,241 INFO L226 Difference]: Without dead ends: 1775 [2020-10-12 16:07:32,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:07:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2020-10-12 16:07:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 103. [2020-10-12 16:07:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:07:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-12 16:07:32,253 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 94 [2020-10-12 16:07:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:32,253 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-12 16:07:32,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:07:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-12 16:07:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:07:32,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:32,254 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:32,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:07:32,254 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash 285071998, now seen corresponding path program 40 times [2020-10-12 16:07:32,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:32,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248548185] [2020-10-12 16:07:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:32,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:33,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:07:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:34,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:34,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:34,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248548185] [2020-10-12 16:07:34,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:34,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:07:34,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380005156] [2020-10-12 16:07:34,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:07:34,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:07:34,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:07:34,544 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 45 states. [2020-10-12 16:07:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:35,009 INFO L93 Difference]: Finished difference Result 390 states and 434 transitions. [2020-10-12 16:07:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:07:35,010 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-12 16:07:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:35,012 INFO L225 Difference]: With dead ends: 390 [2020-10-12 16:07:35,012 INFO L226 Difference]: Without dead ends: 380 [2020-10-12 16:07:35,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:07:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-12 16:07:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 99. [2020-10-12 16:07:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:07:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-12 16:07:35,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-12 16:07:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:35,018 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-12 16:07:35,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:07:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-12 16:07:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:07:35,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:35,019 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:35,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:07:35,019 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1248847015, now seen corresponding path program 41 times [2020-10-12 16:07:35,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:35,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265276677] [2020-10-12 16:07:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:35,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:07:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:07:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:37,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:37,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:37,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:37,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:37,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:37,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:37,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:37,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265276677] [2020-10-12 16:07:37,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:37,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:07:37,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55387654] [2020-10-12 16:07:37,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:07:37,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:07:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:07:37,541 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-12 16:07:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:37,965 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2020-10-12 16:07:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:07:37,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-12 16:07:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:37,967 INFO L225 Difference]: With dead ends: 233 [2020-10-12 16:07:37,967 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 16:07:37,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:07:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 16:07:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 101. [2020-10-12 16:07:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:07:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-12 16:07:37,972 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-12 16:07:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:37,972 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-12 16:07:37,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:07:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-12 16:07:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 16:07:37,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:37,973 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:37,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:07:37,973 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2123731316, now seen corresponding path program 42 times [2020-10-12 16:07:37,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:37,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552794336] [2020-10-12 16:07:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 16:07:39,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:40,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:40,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:40,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:40,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:40,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552794336] [2020-10-12 16:07:40,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:40,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:07:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111603401] [2020-10-12 16:07:40,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:07:40,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:07:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:07:40,108 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-12 16:07:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:40,569 INFO L93 Difference]: Finished difference Result 2128 states and 2172 transitions. [2020-10-12 16:07:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:07:40,569 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-12 16:07:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:40,578 INFO L225 Difference]: With dead ends: 2128 [2020-10-12 16:07:40,578 INFO L226 Difference]: Without dead ends: 2122 [2020-10-12 16:07:40,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:07:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-10-12 16:07:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 106. [2020-10-12 16:07:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 16:07:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-12 16:07:40,589 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2020-10-12 16:07:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:40,589 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-12 16:07:40,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:07:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-12 16:07:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:07:40,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:40,590 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:40,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:07:40,591 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:40,591 INFO L82 PathProgramCache]: Analyzing trace with hash 471198927, now seen corresponding path program 43 times [2020-10-12 16:07:40,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:40,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137573907] [2020-10-12 16:07:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:40,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:41,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:07:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 16:07:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:43,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137573907] [2020-10-12 16:07:43,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:07:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759018530] [2020-10-12 16:07:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:07:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:07:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:07:43,189 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 48 states. [2020-10-12 16:07:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:43,662 INFO L93 Difference]: Finished difference Result 2133 states and 2178 transitions. [2020-10-12 16:07:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:07:43,663 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-12 16:07:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:43,670 INFO L225 Difference]: With dead ends: 2133 [2020-10-12 16:07:43,670 INFO L226 Difference]: Without dead ends: 2127 [2020-10-12 16:07:43,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:07:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2020-10-12 16:07:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 111. [2020-10-12 16:07:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:07:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-12 16:07:43,679 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 102 [2020-10-12 16:07:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:43,680 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-12 16:07:43,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:07:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-12 16:07:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 16:07:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:43,681 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:43,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:07:43,681 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1525472618, now seen corresponding path program 44 times [2020-10-12 16:07:43,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:43,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829987258] [2020-10-12 16:07:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:44,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:07:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 16:07:44,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:45,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:45,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:45,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:45,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:45,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:45,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:45,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:45,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:45,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:45,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:45,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829987258] [2020-10-12 16:07:45,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:45,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:07:45,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135119665] [2020-10-12 16:07:45,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:07:45,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:07:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:07:45,740 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 49 states. [2020-10-12 16:07:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:46,358 INFO L93 Difference]: Finished difference Result 426 states and 474 transitions. [2020-10-12 16:07:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:07:46,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-12 16:07:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:46,360 INFO L225 Difference]: With dead ends: 426 [2020-10-12 16:07:46,361 INFO L226 Difference]: Without dead ends: 416 [2020-10-12 16:07:46,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:07:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-12 16:07:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 107. [2020-10-12 16:07:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:07:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-12 16:07:46,365 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-12 16:07:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:46,366 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-12 16:07:46,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:07:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-12 16:07:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:07:46,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:46,367 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:46,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:07:46,367 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1070207813, now seen corresponding path program 45 times [2020-10-12 16:07:46,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:46,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861024428] [2020-10-12 16:07:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:46,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:48,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:48,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:07:48,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:48,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-12 16:07:48,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:48,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:07:48,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:48,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 16:07:48,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:49,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:49,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:49,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:49,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:49,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861024428] [2020-10-12 16:07:49,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:49,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:07:49,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460008344] [2020-10-12 16:07:49,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:07:49,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:07:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:07:49,239 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 50 states. [2020-10-12 16:07:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:49,867 INFO L93 Difference]: Finished difference Result 253 states and 300 transitions. [2020-10-12 16:07:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:07:49,868 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-12 16:07:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:49,869 INFO L225 Difference]: With dead ends: 253 [2020-10-12 16:07:49,870 INFO L226 Difference]: Without dead ends: 247 [2020-10-12 16:07:49,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:07:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-12 16:07:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 109. [2020-10-12 16:07:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:07:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-12 16:07:49,873 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-12 16:07:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:49,874 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-12 16:07:49,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:07:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-12 16:07:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:07:49,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:49,875 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:49,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:07:49,875 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1647394400, now seen corresponding path program 46 times [2020-10-12 16:07:49,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:49,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738900977] [2020-10-12 16:07:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:07:52,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:52,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 16:07:52,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:53,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:53,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:53,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:53,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:53,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:53,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738900977] [2020-10-12 16:07:53,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:53,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:07:53,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884139617] [2020-10-12 16:07:53,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:07:53,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:07:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:07:53,322 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 51 states. [2020-10-12 16:07:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:53,851 INFO L93 Difference]: Finished difference Result 258 states and 306 transitions. [2020-10-12 16:07:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:07:53,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-12 16:07:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:53,853 INFO L225 Difference]: With dead ends: 258 [2020-10-12 16:07:53,854 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 16:07:53,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:07:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 16:07:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 111. [2020-10-12 16:07:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:07:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-12 16:07:53,857 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2020-10-12 16:07:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:53,858 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-12 16:07:53,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:07:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-12 16:07:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 16:07:53,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:53,859 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:53,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:07:53,859 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2022043973, now seen corresponding path program 47 times [2020-10-12 16:07:53,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:53,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229306812] [2020-10-12 16:07:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:07:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 16:07:55,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:57,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:57,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:57,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:57,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229306812] [2020-10-12 16:07:57,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:57,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:07:57,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312208902] [2020-10-12 16:07:57,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:07:57,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:07:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:07:57,128 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 52 states. [2020-10-12 16:07:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:57,688 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2020-10-12 16:07:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:07:57,689 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-12 16:07:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:57,691 INFO L225 Difference]: With dead ends: 263 [2020-10-12 16:07:57,691 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 16:07:57,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:07:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 16:07:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 113. [2020-10-12 16:07:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:07:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-12 16:07:57,695 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-10-12 16:07:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:57,696 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-12 16:07:57,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:07:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-12 16:07:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 16:07:57,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:57,697 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:57,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:07:57,697 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2110796886, now seen corresponding path program 48 times [2020-10-12 16:07:57,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:57,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356373788] [2020-10-12 16:07:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:57,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:58,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 16:08:00,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2364 [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 16:08:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:01,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:01,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:01,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:01,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:01,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:01,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356373788] [2020-10-12 16:08:01,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:01,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:08:01,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024386285] [2020-10-12 16:08:01,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:08:01,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:08:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:08:01,457 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 53 states. [2020-10-12 16:08:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:02,011 INFO L93 Difference]: Finished difference Result 2716 states and 2766 transitions. [2020-10-12 16:08:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:08:02,011 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-12 16:08:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:02,020 INFO L225 Difference]: With dead ends: 2716 [2020-10-12 16:08:02,020 INFO L226 Difference]: Without dead ends: 2710 [2020-10-12 16:08:02,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:08:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-10-12 16:08:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 118. [2020-10-12 16:08:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 16:08:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-12 16:08:02,037 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2020-10-12 16:08:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:02,040 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-12 16:08:02,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:08:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-12 16:08:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:08:02,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:02,041 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:02,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:08:02,041 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash 926113585, now seen corresponding path program 49 times [2020-10-12 16:08:02,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:02,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593261427] [2020-10-12 16:08:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:02,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:02,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:04,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2021 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 16:08:04,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:05,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:05,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:05,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:05,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:05,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:05,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593261427] [2020-10-12 16:08:05,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:05,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:08:05,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530577191] [2020-10-12 16:08:05,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:08:05,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:08:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:08:05,505 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 54 states. [2020-10-12 16:08:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:05,995 INFO L93 Difference]: Finished difference Result 2721 states and 2772 transitions. [2020-10-12 16:08:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:08:05,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-12 16:08:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:06,005 INFO L225 Difference]: With dead ends: 2721 [2020-10-12 16:08:06,005 INFO L226 Difference]: Without dead ends: 2715 [2020-10-12 16:08:06,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:08:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2020-10-12 16:08:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 123. [2020-10-12 16:08:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 16:08:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-12 16:08:06,016 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 114 [2020-10-12 16:08:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:06,017 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-12 16:08:06,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:08:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-12 16:08:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 16:08:06,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:06,018 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:06,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:08:06,018 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 611794764, now seen corresponding path program 50 times [2020-10-12 16:08:06,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:06,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789710293] [2020-10-12 16:08:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:06,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:08,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:08,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:08:08,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:08,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2363 [2020-10-12 16:08:08,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:08,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:08:08,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:08:08,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-12 16:08:08,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:09,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:09,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:09,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:09,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789710293] [2020-10-12 16:08:09,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:09,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:08:09,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527181130] [2020-10-12 16:08:09,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:08:09,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:08:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:08:09,902 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 55 states. [2020-10-12 16:08:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:10,567 INFO L93 Difference]: Finished difference Result 480 states and 534 transitions. [2020-10-12 16:08:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:08:10,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-12 16:08:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:10,570 INFO L225 Difference]: With dead ends: 480 [2020-10-12 16:08:10,570 INFO L226 Difference]: Without dead ends: 470 [2020-10-12 16:08:10,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:08:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-12 16:08:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 119. [2020-10-12 16:08:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:08:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-12 16:08:10,574 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2020-10-12 16:08:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:10,575 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-12 16:08:10,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:08:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-12 16:08:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:08:10,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:10,576 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:10,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:08:10,576 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash -800881497, now seen corresponding path program 51 times [2020-10-12 16:08:10,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:10,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482678553] [2020-10-12 16:08:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:10,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:12,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:12,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:08:12,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:12,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2166 [2020-10-12 16:08:12,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:12,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:08:12,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:12,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 16:08:12,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:14,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:14,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:14,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482678553] [2020-10-12 16:08:14,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:14,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:08:14,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550364759] [2020-10-12 16:08:14,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:08:14,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:08:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:08:14,316 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 56 states. [2020-10-12 16:08:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:14,827 INFO L93 Difference]: Finished difference Result 3037 states and 3090 transitions. [2020-10-12 16:08:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:08:14,827 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-12 16:08:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:14,837 INFO L225 Difference]: With dead ends: 3037 [2020-10-12 16:08:14,838 INFO L226 Difference]: Without dead ends: 3031 [2020-10-12 16:08:14,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:08:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2020-10-12 16:08:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 124. [2020-10-12 16:08:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 16:08:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-12 16:08:14,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 118 [2020-10-12 16:08:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:14,850 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-12 16:08:14,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:08:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-12 16:08:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:08:14,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:14,851 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:14,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:08:14,851 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1173102782, now seen corresponding path program 52 times [2020-10-12 16:08:14,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:14,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653424170] [2020-10-12 16:08:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:14,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:17,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:17,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:08:17,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-12 16:08:17,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:08:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 16:08:17,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:18,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:18,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:19,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653424170] [2020-10-12 16:08:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:08:19,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171976091] [2020-10-12 16:08:19,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:08:19,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:19,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:08:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:08:19,007 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 57 states. [2020-10-12 16:08:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:19,606 INFO L93 Difference]: Finished difference Result 3042 states and 3096 transitions. [2020-10-12 16:08:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:08:19,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-12 16:08:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:19,615 INFO L225 Difference]: With dead ends: 3042 [2020-10-12 16:08:19,615 INFO L226 Difference]: Without dead ends: 3036 [2020-10-12 16:08:19,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:08:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-10-12 16:08:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 129. [2020-10-12 16:08:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:08:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-12 16:08:19,627 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 120 [2020-10-12 16:08:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:19,627 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-12 16:08:19,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:08:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-12 16:08:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 16:08:19,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:19,628 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:19,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:08:19,628 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1899495197, now seen corresponding path program 53 times [2020-10-12 16:08:19,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:19,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299510592] [2020-10-12 16:08:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:08:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 16:08:22,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:23,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:23,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:23,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:23,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:23,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:23,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:23,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:23,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:23,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:23,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299510592] [2020-10-12 16:08:23,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:23,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:08:23,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205553889] [2020-10-12 16:08:23,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:08:23,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:08:23,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:08:23,858 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 58 states. [2020-10-12 16:08:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:24,483 INFO L93 Difference]: Finished difference Result 3047 states and 3102 transitions. [2020-10-12 16:08:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:08:24,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-12 16:08:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:24,497 INFO L225 Difference]: With dead ends: 3047 [2020-10-12 16:08:24,497 INFO L226 Difference]: Without dead ends: 3041 [2020-10-12 16:08:24,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:08:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-10-12 16:08:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 134. [2020-10-12 16:08:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 16:08:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-12 16:08:24,521 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 122 [2020-10-12 16:08:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:24,522 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-12 16:08:24,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:08:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-12 16:08:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 16:08:24,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:24,525 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:24,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:08:24,525 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash -271346632, now seen corresponding path program 54 times [2020-10-12 16:08:24,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:24,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726017215] [2020-10-12 16:08:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:24,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:26,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 16:08:26,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:28,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:28,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726017215] [2020-10-12 16:08:28,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:28,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:08:28,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713568343] [2020-10-12 16:08:28,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:08:28,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:28,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:08:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:08:28,604 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-12 16:08:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:29,187 INFO L93 Difference]: Finished difference Result 3052 states and 3108 transitions. [2020-10-12 16:08:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:08:29,188 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 124 [2020-10-12 16:08:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:29,194 INFO L225 Difference]: With dead ends: 3052 [2020-10-12 16:08:29,194 INFO L226 Difference]: Without dead ends: 3046 [2020-10-12 16:08:29,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:08:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2020-10-12 16:08:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 139. [2020-10-12 16:08:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 16:08:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-12 16:08:29,209 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 124 [2020-10-12 16:08:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:29,209 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-12 16:08:29,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:08:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-12 16:08:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:08:29,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:29,210 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:29,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:08:29,211 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash 903761555, now seen corresponding path program 55 times [2020-10-12 16:08:29,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:29,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257813731] [2020-10-12 16:08:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:29,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:29,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:32,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:32,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 16:08:32,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-10-12 16:08:32,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:08:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:08:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-12 16:08:32,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:34,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:34,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:34,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:34,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:34,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:34,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:34,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257813731] [2020-10-12 16:08:34,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:34,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:08:34,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144358166] [2020-10-12 16:08:34,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:08:34,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:08:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:08:34,197 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 60 states. [2020-10-12 16:08:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:35,039 INFO L93 Difference]: Finished difference Result 739 states and 800 transitions. [2020-10-12 16:08:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:08:35,040 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 126 [2020-10-12 16:08:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:35,042 INFO L225 Difference]: With dead ends: 739 [2020-10-12 16:08:35,042 INFO L226 Difference]: Without dead ends: 725 [2020-10-12 16:08:35,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:08:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-12 16:08:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 129. [2020-10-12 16:08:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:08:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-12 16:08:35,047 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2020-10-12 16:08:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:35,048 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-12 16:08:35,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:08:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-12 16:08:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 16:08:35,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:35,049 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:35,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:08:35,049 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash 606330414, now seen corresponding path program 56 times [2020-10-12 16:08:35,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:35,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089115569] [2020-10-12 16:08:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:36,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:37,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:37,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:08:37,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:37,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2851 [2020-10-12 16:08:37,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:08:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:08:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 16:08:37,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:39,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:39,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:39,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:39,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:39,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:39,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:39,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:39,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:39,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:39,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:39,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089115569] [2020-10-12 16:08:39,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:39,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:08:39,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30399613] [2020-10-12 16:08:39,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:08:39,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:08:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:08:39,823 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 61 states. [2020-10-12 16:08:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:40,535 INFO L93 Difference]: Finished difference Result 308 states and 366 transitions. [2020-10-12 16:08:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:08:40,535 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 128 [2020-10-12 16:08:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:40,536 INFO L225 Difference]: With dead ends: 308 [2020-10-12 16:08:40,537 INFO L226 Difference]: Without dead ends: 302 [2020-10-12 16:08:40,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:08:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-12 16:08:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 131. [2020-10-12 16:08:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:08:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-12 16:08:40,540 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2020-10-12 16:08:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-12 16:08:40,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:08:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-12 16:08:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:08:40,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:40,543 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:40,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:08:40,545 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1757154551, now seen corresponding path program 57 times [2020-10-12 16:08:40,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:40,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760320403] [2020-10-12 16:08:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:43,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:43,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:08:43,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2719 [2020-10-12 16:08:43,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:08:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:08:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-12 16:08:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:45,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:45,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:08:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:45,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760320403] [2020-10-12 16:08:45,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:45,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:08:45,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724454654] [2020-10-12 16:08:45,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:08:45,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:45,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:08:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:08:45,249 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 62 states. [2020-10-12 16:08:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:45,960 INFO L93 Difference]: Finished difference Result 313 states and 372 transitions. [2020-10-12 16:08:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:08:45,960 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 130 [2020-10-12 16:08:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:45,962 INFO L225 Difference]: With dead ends: 313 [2020-10-12 16:08:45,962 INFO L226 Difference]: Without dead ends: 307 [2020-10-12 16:08:45,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:08:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-12 16:08:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 133. [2020-10-12 16:08:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:08:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-12 16:08:45,966 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2020-10-12 16:08:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:45,966 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-12 16:08:45,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:08:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-12 16:08:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:08:45,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:45,967 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:45,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:08:45,967 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:45,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1028506332, now seen corresponding path program 58 times [2020-10-12 16:08:45,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:45,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018574874] [2020-10-12 16:08:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:46,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3397 [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:08:49,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:49,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 16:08:49,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:51,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:51,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:51,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:51,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:51,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018574874] [2020-10-12 16:08:51,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:51,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:08:51,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414780071] [2020-10-12 16:08:51,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:08:51,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:08:51,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:08:51,405 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 63 states. [2020-10-12 16:08:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:52,115 INFO L93 Difference]: Finished difference Result 3856 states and 3916 transitions. [2020-10-12 16:08:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:08:52,116 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 132 [2020-10-12 16:08:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:52,124 INFO L225 Difference]: With dead ends: 3856 [2020-10-12 16:08:52,125 INFO L226 Difference]: Without dead ends: 3850 [2020-10-12 16:08:52,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:08:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-10-12 16:08:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 138. [2020-10-12 16:08:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 16:08:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-12 16:08:52,141 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 132 [2020-10-12 16:08:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:52,142 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-12 16:08:52,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:08:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-12 16:08:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 16:08:52,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:52,143 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:52,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:08:52,143 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash -877237121, now seen corresponding path program 59 times [2020-10-12 16:08:52,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:52,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298569092] [2020-10-12 16:08:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:55,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3227 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 16:08:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:57,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:57,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:57,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298569092] [2020-10-12 16:08:57,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:57,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:08:57,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007973444] [2020-10-12 16:08:57,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:08:57,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:08:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:08:57,511 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 64 states. [2020-10-12 16:08:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:58,166 INFO L93 Difference]: Finished difference Result 3861 states and 3922 transitions. [2020-10-12 16:08:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:08:58,166 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 134 [2020-10-12 16:08:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:58,172 INFO L225 Difference]: With dead ends: 3861 [2020-10-12 16:08:58,172 INFO L226 Difference]: Without dead ends: 3855 [2020-10-12 16:08:58,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:08:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2020-10-12 16:08:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 143. [2020-10-12 16:08:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 16:08:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-12 16:08:58,192 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 134 [2020-10-12 16:08:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:58,192 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-12 16:08:58,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:08:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-12 16:08:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 16:08:58,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:58,193 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:58,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:08:58,194 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:58,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1536413414, now seen corresponding path program 60 times [2020-10-12 16:08:58,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:58,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938076744] [2020-10-12 16:08:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:59,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:01,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3676 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 16:09:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:04,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:04,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:04,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:04,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:04,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:04,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:04,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:04,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:04,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:04,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:04,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:04,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938076744] [2020-10-12 16:09:04,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:04,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:09:04,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038909030] [2020-10-12 16:09:04,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:09:04,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:09:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:09:04,087 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 65 states. [2020-10-12 16:09:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:04,882 INFO L93 Difference]: Finished difference Result 570 states and 634 transitions. [2020-10-12 16:09:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:09:04,883 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 136 [2020-10-12 16:09:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:04,884 INFO L225 Difference]: With dead ends: 570 [2020-10-12 16:09:04,884 INFO L226 Difference]: Without dead ends: 560 [2020-10-12 16:09:04,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:09:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-12 16:09:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 139. [2020-10-12 16:09:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 16:09:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-12 16:09:04,889 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2020-10-12 16:09:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:04,890 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-12 16:09:04,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:09:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-12 16:09:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:09:04,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:04,891 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:04,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:09:04,891 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:04,892 INFO L82 PathProgramCache]: Analyzing trace with hash 650328821, now seen corresponding path program 61 times [2020-10-12 16:09:04,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:04,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892077782] [2020-10-12 16:09:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:04,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:07,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2625 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-12 16:09:07,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:09,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:09,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:09,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:09,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:09,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892077782] [2020-10-12 16:09:09,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:09,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:09:09,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031885557] [2020-10-12 16:09:09,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:09:09,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:09,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:09:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:09:09,786 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 66 states. [2020-10-12 16:09:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:10,672 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2020-10-12 16:09:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:09:10,673 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 138 [2020-10-12 16:09:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:10,674 INFO L225 Difference]: With dead ends: 333 [2020-10-12 16:09:10,674 INFO L226 Difference]: Without dead ends: 327 [2020-10-12 16:09:10,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:09:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-12 16:09:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 141. [2020-10-12 16:09:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:09:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-12 16:09:10,678 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2020-10-12 16:09:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:10,679 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-12 16:09:10,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:09:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-12 16:09:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 16:09:10,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:10,679 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:10,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:09:10,680 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1870608912, now seen corresponding path program 62 times [2020-10-12 16:09:10,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:10,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128602494] [2020-10-12 16:09:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:14,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:14,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:09:14,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:14,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3912 [2020-10-12 16:09:14,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:09:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-12 16:09:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:16,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128602494] [2020-10-12 16:09:16,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:09:16,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068085012] [2020-10-12 16:09:16,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:09:16,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:09:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:09:16,937 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 67 states. [2020-10-12 16:09:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:17,784 INFO L93 Difference]: Finished difference Result 4368 states and 4432 transitions. [2020-10-12 16:09:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 16:09:17,785 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 140 [2020-10-12 16:09:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:17,789 INFO L225 Difference]: With dead ends: 4368 [2020-10-12 16:09:17,789 INFO L226 Difference]: Without dead ends: 4362 [2020-10-12 16:09:17,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:09:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2020-10-12 16:09:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 146. [2020-10-12 16:09:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:09:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-12 16:09:17,803 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2020-10-12 16:09:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:17,803 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-12 16:09:17,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:09:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-12 16:09:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 16:09:17,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:17,804 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:17,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:09:17,805 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2033704555, now seen corresponding path program 63 times [2020-10-12 16:09:17,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:17,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065773590] [2020-10-12 16:09:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:21,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3292 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 16:09:21,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:23,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065773590] [2020-10-12 16:09:23,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:23,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:09:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950895570] [2020-10-12 16:09:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:09:23,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:09:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:09:23,520 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 68 states. [2020-10-12 16:09:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:24,437 INFO L93 Difference]: Finished difference Result 4373 states and 4438 transitions. [2020-10-12 16:09:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:09:24,438 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 142 [2020-10-12 16:09:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:24,441 INFO L225 Difference]: With dead ends: 4373 [2020-10-12 16:09:24,442 INFO L226 Difference]: Without dead ends: 4367 [2020-10-12 16:09:24,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:09:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2020-10-12 16:09:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 151. [2020-10-12 16:09:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 16:09:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-12 16:09:24,457 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 142 [2020-10-12 16:09:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:24,458 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-12 16:09:24,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:09:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-12 16:09:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:09:24,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:24,459 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:24,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:09:24,459 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -145172474, now seen corresponding path program 64 times [2020-10-12 16:09:24,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:24,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752654001] [2020-10-12 16:09:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 16:09:28,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4021 [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-12 16:09:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:31,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:31,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:31,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:31,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752654001] [2020-10-12 16:09:31,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:31,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:09:31,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004907522] [2020-10-12 16:09:31,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:09:31,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:09:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:09:31,021 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 69 states. [2020-10-12 16:09:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:32,098 INFO L93 Difference]: Finished difference Result 606 states and 674 transitions. [2020-10-12 16:09:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 16:09:32,098 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 144 [2020-10-12 16:09:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:32,100 INFO L225 Difference]: With dead ends: 606 [2020-10-12 16:09:32,100 INFO L226 Difference]: Without dead ends: 596 [2020-10-12 16:09:32,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:09:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-10-12 16:09:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 147. [2020-10-12 16:09:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 16:09:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-12 16:09:32,105 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2020-10-12 16:09:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:32,106 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-12 16:09:32,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:09:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-12 16:09:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 16:09:32,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:32,107 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:32,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:09:32,108 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1898043105, now seen corresponding path program 65 times [2020-10-12 16:09:32,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:32,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354626815] [2020-10-12 16:09:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:36,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4741 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 16:09:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:39,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:39,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:39,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:39,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:39,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:39,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354626815] [2020-10-12 16:09:39,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:39,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:09:39,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834644544] [2020-10-12 16:09:39,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:09:39,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:09:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:09:39,451 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 70 states. [2020-10-12 16:09:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:40,225 INFO L93 Difference]: Finished difference Result 4773 states and 4840 transitions. [2020-10-12 16:09:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:09:40,226 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 146 [2020-10-12 16:09:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:40,231 INFO L225 Difference]: With dead ends: 4773 [2020-10-12 16:09:40,232 INFO L226 Difference]: Without dead ends: 4767 [2020-10-12 16:09:40,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:09:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2020-10-12 16:09:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 152. [2020-10-12 16:09:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 16:09:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-10-12 16:09:40,247 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 146 [2020-10-12 16:09:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:40,248 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-10-12 16:09:40,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:09:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-10-12 16:09:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 16:09:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:40,249 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:40,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:09:40,249 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:40,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1666807044, now seen corresponding path program 66 times [2020-10-12 16:09:40,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:40,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208827814] [2020-10-12 16:09:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:40,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4048 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:44,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-12 16:09:44,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:46,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208827814] [2020-10-12 16:09:46,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:46,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:09:46,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682320913] [2020-10-12 16:09:46,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:09:46,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:09:46,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:09:46,990 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 71 states. [2020-10-12 16:09:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:47,891 INFO L93 Difference]: Finished difference Result 4778 states and 4846 transitions. [2020-10-12 16:09:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:09:47,892 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 148 [2020-10-12 16:09:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:47,896 INFO L225 Difference]: With dead ends: 4778 [2020-10-12 16:09:47,896 INFO L226 Difference]: Without dead ends: 4772 [2020-10-12 16:09:47,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:09:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2020-10-12 16:09:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 157. [2020-10-12 16:09:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:09:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-12 16:09:47,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 148 [2020-10-12 16:09:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:47,908 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-12 16:09:47,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:09:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-12 16:09:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:09:47,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:47,909 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:47,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:09:47,909 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash -103898025, now seen corresponding path program 67 times [2020-10-12 16:09:47,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:47,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414856176] [2020-10-12 16:09:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:47,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:48,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:52,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 16:09:52,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4792 [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 16:09:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:55,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:55,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414856176] [2020-10-12 16:09:55,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:55,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:09:55,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093065718] [2020-10-12 16:09:55,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:09:55,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:09:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:09:55,469 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 72 states. [2020-10-12 16:09:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:56,703 INFO L93 Difference]: Finished difference Result 633 states and 704 transitions. [2020-10-12 16:09:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:09:56,704 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 150 [2020-10-12 16:09:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:56,705 INFO L225 Difference]: With dead ends: 633 [2020-10-12 16:09:56,705 INFO L226 Difference]: Without dead ends: 623 [2020-10-12 16:09:56,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:09:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-12 16:09:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 153. [2020-10-12 16:09:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 16:09:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-12 16:09:56,711 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2020-10-12 16:09:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:56,711 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-12 16:09:56,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:09:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-12 16:09:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 16:09:56,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:56,712 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:56,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:09:56,712 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1386884366, now seen corresponding path program 68 times [2020-10-12 16:09:56,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:56,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41716903] [2020-10-12 16:09:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:01,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:10:01,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4365 [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-12 16:10:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:03,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:03,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:03,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:03,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:03,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:03,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41716903] [2020-10-12 16:10:03,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:03,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:10:03,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602647467] [2020-10-12 16:10:03,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:10:03,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:10:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:10:03,963 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 73 states. [2020-10-12 16:10:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:05,274 INFO L93 Difference]: Finished difference Result 368 states and 438 transitions. [2020-10-12 16:10:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 16:10:05,275 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 152 [2020-10-12 16:10:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:05,276 INFO L225 Difference]: With dead ends: 368 [2020-10-12 16:10:05,276 INFO L226 Difference]: Without dead ends: 362 [2020-10-12 16:10:05,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:10:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-12 16:10:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 155. [2020-10-12 16:10:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 16:10:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-12 16:10:05,280 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2020-10-12 16:10:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:05,281 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-12 16:10:05,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:10:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-12 16:10:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:10:05,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:05,282 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:05,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:10:05,282 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:05,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1681144115, now seen corresponding path program 69 times [2020-10-12 16:10:05,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:05,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595190059] [2020-10-12 16:10:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:09,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4181 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-12 16:10:09,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:12,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:12,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:12,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:12,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:12,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:12,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:12,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:12,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595190059] [2020-10-12 16:10:12,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:12,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:10:12,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064287998] [2020-10-12 16:10:12,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:10:12,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:10:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:10:12,445 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 74 states. [2020-10-12 16:10:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:13,345 INFO L93 Difference]: Finished difference Result 5341 states and 5412 transitions. [2020-10-12 16:10:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:10:13,346 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 154 [2020-10-12 16:10:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:13,350 INFO L225 Difference]: With dead ends: 5341 [2020-10-12 16:10:13,351 INFO L226 Difference]: Without dead ends: 5335 [2020-10-12 16:10:13,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:10:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5335 states. [2020-10-12 16:10:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5335 to 160. [2020-10-12 16:10:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 16:10:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-10-12 16:10:13,377 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2020-10-12 16:10:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:13,378 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-10-12 16:10:13,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:10:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-10-12 16:10:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:10:13,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:13,379 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:13,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:10:13,379 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash -996921368, now seen corresponding path program 70 times [2020-10-12 16:10:13,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:13,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335248174] [2020-10-12 16:10:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:14,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:18,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:18,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 16:10:18,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4884 [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-12 16:10:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:21,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:21,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:21,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:21,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335248174] [2020-10-12 16:10:21,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:21,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:10:21,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827906401] [2020-10-12 16:10:21,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:10:21,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:10:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:10:21,344 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 75 states. [2020-10-12 16:10:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:22,659 INFO L93 Difference]: Finished difference Result 520 states and 593 transitions. [2020-10-12 16:10:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 16:10:22,660 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 156 [2020-10-12 16:10:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:22,661 INFO L225 Difference]: With dead ends: 520 [2020-10-12 16:10:22,661 INFO L226 Difference]: Without dead ends: 512 [2020-10-12 16:10:22,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2636, Invalid=3064, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:10:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-12 16:10:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 159. [2020-10-12 16:10:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 16:10:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-10-12 16:10:22,665 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2020-10-12 16:10:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:22,666 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-10-12 16:10:22,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:10:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-10-12 16:10:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 16:10:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:22,667 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:22,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:10:22,667 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -588857789, now seen corresponding path program 71 times [2020-10-12 16:10:22,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:22,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225061203] [2020-10-12 16:10:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:27,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4886 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-12 16:10:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:30,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:30,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:30,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:30,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225061203] [2020-10-12 16:10:30,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:30,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:10:30,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358553049] [2020-10-12 16:10:30,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:10:30,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:10:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:10:30,704 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 76 states. [2020-10-12 16:10:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:31,765 INFO L93 Difference]: Finished difference Result 5637 states and 5710 transitions. [2020-10-12 16:10:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:10:31,766 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 158 [2020-10-12 16:10:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:31,771 INFO L225 Difference]: With dead ends: 5637 [2020-10-12 16:10:31,771 INFO L226 Difference]: Without dead ends: 5631 [2020-10-12 16:10:31,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2709, Invalid=3143, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:10:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2020-10-12 16:10:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 164. [2020-10-12 16:10:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 16:10:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-10-12 16:10:31,792 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2020-10-12 16:10:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:31,792 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-10-12 16:10:31,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:10:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-10-12 16:10:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 16:10:31,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:31,793 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:31,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:10:31,793 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash 718217694, now seen corresponding path program 72 times [2020-10-12 16:10:31,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:31,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532863277] [2020-10-12 16:10:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:31,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:32,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:36,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:10:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:10:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 16:10:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0