/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/array-fpi/s3lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:57:05,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:57:05,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:57:05,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:57:05,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:57:05,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:57:05,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:57:05,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:57:05,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:57:05,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:57:05,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:57:05,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:57:05,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:57:05,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:57:05,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:57:05,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:57:05,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:57:05,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:57:05,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:57:05,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:57:05,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:57:05,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:57:05,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:57:05,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:57:05,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:57:05,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:57:05,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:57:05,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:57:05,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:57:05,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:57:05,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:57:05,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:57:05,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:57:05,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:57:05,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:57:05,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:57:05,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:57:05,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:57:05,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:57:05,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:57:05,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:57:05,143 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 [2020-10-29 03:57:05,178 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:57:05,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:57:05,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:57:05,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:57:05,184 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:57:05,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:57:05,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:57:05,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:57:05,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:57:05,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:57:05,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:57:05,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:57:05,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:57:05,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:57:05,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:57:05,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:57:05,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:57:05,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:57:05,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:57:05,194 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:57:05,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:57:05,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:57:05,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:57:05,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:57:05,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:57:05,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:57:05,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:57:05,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:57:05,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:57:05,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:57:05,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:57:05,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:57:05,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:57:05,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:57:05,692 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:57:05,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-29 03:57:05,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa25fa48f/1990c79a239848a492fc429f4b13e764/FLAG1e48202be [2020-10-29 03:57:06,478 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:57:06,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-29 03:57:06,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa25fa48f/1990c79a239848a492fc429f4b13e764/FLAG1e48202be [2020-10-29 03:57:06,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa25fa48f/1990c79a239848a492fc429f4b13e764 [2020-10-29 03:57:06,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:57:06,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:57:06,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:57:06,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:57:06,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:57:06,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:57:06" (1/1) ... [2020-10-29 03:57:06,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de41a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:06, skipping insertion in model container [2020-10-29 03:57:06,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:57:06" (1/1) ... [2020-10-29 03:57:06,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:57:06,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:57:07,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:57:07,059 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:57:07,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:57:07,111 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:57:07,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07 WrapperNode [2020-10-29 03:57:07,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:57:07,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:57:07,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:57:07,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:57:07,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (1/1) ... [2020-10-29 03:57:07,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:57:07,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:57:07,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:57:07,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:57:07,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (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 [2020-10-29 03:57:07,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:57:07,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:57:07,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:57:07,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:57:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:57:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:57:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:57:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:57:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:57:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:57:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:57:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:57:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:57:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:57:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:57:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:57:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:57:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:57:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:57:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:57:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:57:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:57:07,773 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:57:07,776 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 03:57:07,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:57:07 BoogieIcfgContainer [2020-10-29 03:57:07,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:57:07,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:57:07,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:57:07,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:57:07,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:57:06" (1/3) ... [2020-10-29 03:57:07,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb40380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:57:07, skipping insertion in model container [2020-10-29 03:57:07,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:57:07" (2/3) ... [2020-10-29 03:57:07,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb40380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:57:07, skipping insertion in model container [2020-10-29 03:57:07,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:57:07" (3/3) ... [2020-10-29 03:57:07,805 INFO L111 eAbstractionObserver]: Analyzing ICFG s3lif.c [2020-10-29 03:57:07,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:57:07,824 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:57:07,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:57:07,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:57:07,888 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:57:07,888 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:57:07,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:57:07,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:57:07,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:57:07,889 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:57:07,889 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:57:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-29 03:57:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:57:07,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:07,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:07,929 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-29 03:57:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173445766] [2020-10-29 03:57:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:09,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 03:57:09,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:57:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-29 03:57:09,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:09,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:57:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:57:09,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 03:57:09,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 03:57:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:09,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:09,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:09,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 03:57:09,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:09,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:09,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:09,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:09,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:57:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:57:09,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:09,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:57:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:57:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:09,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173445766] [2020-10-29 03:57:09,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:57:09,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:57:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391543828] [2020-10-29 03:57:09,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:57:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:57:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:57:09,430 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-29 03:57:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:09,838 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-29 03:57:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:57:09,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-29 03:57:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:09,848 INFO L225 Difference]: With dead ends: 76 [2020-10-29 03:57:09,849 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 03:57:09,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:57:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 03:57:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-29 03:57:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 03:57:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-29 03:57:09,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-29 03:57:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:09,901 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-29 03:57:09,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:57:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-29 03:57:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:57:09,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:09,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:09,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:57:09,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-29 03:57:09,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:09,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905818236] [2020-10-29 03:57:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:57:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:57:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3542 [2020-10-29 03:57:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:13,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:57:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:14,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:14,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:14,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:14,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:14,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:14,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:14,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:14,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:14,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:14,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:14,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:14,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:14,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:14,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:14,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905818236] [2020-10-29 03:57:14,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:14,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:57:14,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077783135] [2020-10-29 03:57:14,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:57:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:57:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:57:14,055 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-29 03:57:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:14,877 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-29 03:57:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:57:14,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-29 03:57:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:14,881 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:57:14,882 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 03:57:14,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:57:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 03:57:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-29 03:57:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:57:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-29 03:57:14,895 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-29 03:57:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:14,895 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-29 03:57:14,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:57:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-29 03:57:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:57:14,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:14,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:14,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:57:14,898 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:14,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-29 03:57:14,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:14,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990489122] [2020-10-29 03:57:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:16,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:57:16,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:57:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1454 [2020-10-29 03:57:16,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:16,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:16,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:57:16,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:16,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:57:16,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:16,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:16,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:16,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:16,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:16,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:16,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:57:16,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:16,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:16,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:16,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:16,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:16,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:16,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:16,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:16,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:16,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:16,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:16,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990489122] [2020-10-29 03:57:16,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:16,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:57:16,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365441956] [2020-10-29 03:57:16,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:57:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:16,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:57:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:57:16,672 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 11 states. [2020-10-29 03:57:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:17,282 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-29 03:57:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:57:17,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 03:57:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:17,285 INFO L225 Difference]: With dead ends: 73 [2020-10-29 03:57:17,285 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:57:17,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:57:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:57:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-29 03:57:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:57:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 03:57:17,297 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2020-10-29 03:57:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:17,297 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 03:57:17,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:57:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 03:57:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:57:17,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:17,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:17,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:57:17,299 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:17,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-29 03:57:17,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:17,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429515060] [2020-10-29 03:57:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:18,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:18,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:57:18,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:57:18,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-29 03:57:18,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:18,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:57:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:57:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:18,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:18,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:18,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:18,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:18,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:18,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:18,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:18,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:18,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:18,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:57:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429515060] [2020-10-29 03:57:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:57:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335435407] [2020-10-29 03:57:18,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:57:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:57:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:57:18,341 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 8 states. [2020-10-29 03:57:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:18,761 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-29 03:57:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:57:18,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 03:57:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:18,763 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:57:18,764 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:57:18,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:57:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:57:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2020-10-29 03:57:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:57:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 03:57:18,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 33 [2020-10-29 03:57:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:18,775 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 03:57:18,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:57:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 03:57:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:57:18,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:18,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:18,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:57:18,777 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2047640497, now seen corresponding path program 3 times [2020-10-29 03:57:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:18,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332908682] [2020-10-29 03:57:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:18,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:57:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:57:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-29 03:57:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:57:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:57:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:20,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:20,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:20,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:20,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:20,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:20,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:20,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:20,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:20,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:20,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:20,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:20,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:20,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:57:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332908682] [2020-10-29 03:57:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:57:20,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993133375] [2020-10-29 03:57:20,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:57:20,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:57:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:57:20,796 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 8 states. [2020-10-29 03:57:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:21,130 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-29 03:57:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:57:21,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 03:57:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:21,133 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:57:21,133 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 03:57:21,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:57:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 03:57:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-10-29 03:57:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:57:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-29 03:57:21,142 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-10-29 03:57:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:21,142 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-29 03:57:21,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:57:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-29 03:57:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:57:21,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:21,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:21,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:57:21,144 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-29 03:57:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:21,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989695952] [2020-10-29 03:57:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:24,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:25,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:26,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:57:26,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:57:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-29 03:57:26,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:26,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:57:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:57:26,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:57:27,250 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-29 03:57:27,388 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-29 03:57:27,557 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-29 03:57:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:27,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:27,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:27,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:57:27,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:27,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:27,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:27,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:27,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:27,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:27,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:27,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:27,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:27,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:57:27,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989695952] [2020-10-29 03:57:27,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:27,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:57:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848464640] [2020-10-29 03:57:27,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:57:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:57:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:57:27,955 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 19 states. [2020-10-29 03:57:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:29,066 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-29 03:57:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:57:29,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-29 03:57:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:29,069 INFO L225 Difference]: With dead ends: 60 [2020-10-29 03:57:29,069 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 03:57:29,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:57:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 03:57:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-29 03:57:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:57:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 03:57:29,091 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-29 03:57:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:29,091 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 03:57:29,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:57:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 03:57:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:57:29,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:29,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:29,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:57:29,096 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:29,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-29 03:57:29,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:29,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140139316] [2020-10-29 03:57:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:29,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:33,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:57:33,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:57:33,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4081 [2020-10-29 03:57:33,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:33,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:57:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:57:33,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:33,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:33,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:33,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:33,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:33,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:33,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:33,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:33,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:33,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:33,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:33,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:33,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:33,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:33,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:33,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:33,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:57:33,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140139316] [2020-10-29 03:57:33,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:33,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:57:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221359425] [2020-10-29 03:57:33,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:57:33,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:57:33,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:57:33,538 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-29 03:57:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:34,239 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-29 03:57:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:57:34,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 03:57:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:34,241 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:57:34,241 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 03:57:34,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:57:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 03:57:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-29 03:57:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:57:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-29 03:57:34,251 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-29 03:57:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:34,251 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-29 03:57:34,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:57:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-29 03:57:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:57:34,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:34,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:34,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:57:34,253 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-29 03:57:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:34,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431930938] [2020-10-29 03:57:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:34,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:34,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:34,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:37,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:37,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:57:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:57:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3437 [2020-10-29 03:57:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:37,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:57:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:57:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:57:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:38,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:38,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:38,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:38,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:38,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:38,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:38,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:38,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:38,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:38,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:38,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:38,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:38,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:38,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:57:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431930938] [2020-10-29 03:57:38,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:38,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:57:38,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949437859] [2020-10-29 03:57:38,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:57:38,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:57:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:57:38,148 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 14 states. [2020-10-29 03:57:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:39,323 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-29 03:57:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:57:39,324 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 03:57:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:39,325 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:57:39,325 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:57:39,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:57:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:57:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-10-29 03:57:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:57:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-29 03:57:39,336 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 38 [2020-10-29 03:57:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:39,337 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-29 03:57:39,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:57:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-29 03:57:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:57:39,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:39,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:39,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:57:39,338 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-29 03:57:39,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:39,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688245143] [2020-10-29 03:57:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:39,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:39,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:40,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:40,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:57:40,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:57:40,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-29 03:57:40,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:40,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:57:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:57:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:57:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:40,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:40,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:40,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:40,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:40,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:40,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:40,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:40,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:40,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:40,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:40,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:40,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:40,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:40,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:40,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:40,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:40,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:40,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:40,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:40,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:40,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:40,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:40,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:57:40,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688245143] [2020-10-29 03:57:40,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:40,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:57:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220333671] [2020-10-29 03:57:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:57:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:57:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:57:40,618 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2020-10-29 03:57:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:41,065 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2020-10-29 03:57:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:57:41,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-29 03:57:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:41,067 INFO L225 Difference]: With dead ends: 138 [2020-10-29 03:57:41,067 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:57:41,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:57:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:57:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-10-29 03:57:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:57:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-29 03:57:41,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 40 [2020-10-29 03:57:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:41,079 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-29 03:57:41,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:57:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-29 03:57:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:57:41,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:41,080 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:41,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:57:41,081 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 6 times [2020-10-29 03:57:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726415904] [2020-10-29 03:57:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:41,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:42,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:42,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:42,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:46,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:57:46,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 03:57:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:57:46,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:46,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:46,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:57:46,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:57:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:57:46,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:46,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:46,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:46,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:46,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:46,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:57:46,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726415904] [2020-10-29 03:57:46,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:46,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:57:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073423951] [2020-10-29 03:57:46,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:57:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:57:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:57:46,276 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2020-10-29 03:57:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:46,806 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-29 03:57:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:57:46,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-29 03:57:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:46,808 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:57:46,808 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:57:46,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:57:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:57:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-10-29 03:57:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:57:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-29 03:57:46,819 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 43 [2020-10-29 03:57:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:46,819 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-29 03:57:46,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:57:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-29 03:57:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:57:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:46,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:46,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:57:46,821 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-29 03:57:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:46,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287498889] [2020-10-29 03:57:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:47,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:47,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:48,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:51,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:51,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:57:51,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:57:51,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:57:51,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:51,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:57:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:57:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:52,451 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-29 03:57:52,645 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-10-29 03:57:52,789 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-29 03:57:52,920 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-29 03:57:53,135 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-29 03:57:53,347 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-29 03:57:53,551 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-29 03:57:53,718 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-29 03:57:53,929 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-29 03:57:54,081 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-29 03:57:54,270 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-29 03:57:54,454 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-29 03:57:54,619 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-29 03:57:54,777 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-29 03:57:55,084 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-29 03:57:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:55,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:55,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:55,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:55,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:55,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:55,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:55,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:55,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:55,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:55,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:55,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:55,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287498889] [2020-10-29 03:57:55,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:55,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:57:55,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396651331] [2020-10-29 03:57:55,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:57:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:55,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:57:55,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:57:55,483 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 26 states. [2020-10-29 03:57:56,071 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2020-10-29 03:57:57,149 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 03:57:57,307 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-29 03:57:58,027 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-29 03:57:58,290 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-29 03:57:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:58,614 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-29 03:57:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:57:58,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-29 03:57:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:58,616 INFO L225 Difference]: With dead ends: 92 [2020-10-29 03:57:58,617 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 03:57:58,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:57:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 03:57:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-29 03:57:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:57:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-29 03:57:58,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 45 [2020-10-29 03:57:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-29 03:57:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:57:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-29 03:57:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:57:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:58,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:58,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:57:58,634 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-29 03:57:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:58,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097773120] [2020-10-29 03:57:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:58,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:00,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:00,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:03,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:03,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:03,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:58:03,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:58:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:58:03,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:04,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:04,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:04,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:04,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:04,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:04,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:04,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:04,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:04,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:04,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:04,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:04,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:04,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:58:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097773120] [2020-10-29 03:58:04,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:04,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:58:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236052957] [2020-10-29 03:58:04,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:58:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:58:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:58:04,133 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 16 states. [2020-10-29 03:58:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:05,325 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-29 03:58:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:58:05,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 03:58:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:05,327 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:58:05,327 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:58:05,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:58:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:58:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-29 03:58:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:58:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-29 03:58:05,338 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 45 [2020-10-29 03:58:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:05,339 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-29 03:58:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:58:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-29 03:58:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:58:05,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:05,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:05,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:58:05,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-29 03:58:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:05,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038720132] [2020-10-29 03:58:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:05,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:09,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:10,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:58:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:10,781 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2020-10-29 03:58:10,939 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-29 03:58:11,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:11,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:11,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:11,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:11,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:11,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:11,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:11,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:58:11,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038720132] [2020-10-29 03:58:11,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:11,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:58:11,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403476562] [2020-10-29 03:58:11,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:58:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:58:11,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:58:11,306 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 16 states. [2020-10-29 03:58:11,871 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-29 03:58:12,148 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-29 03:58:12,313 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 03:58:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:13,111 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-29 03:58:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:58:13,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 03:58:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:13,114 INFO L225 Difference]: With dead ends: 86 [2020-10-29 03:58:13,114 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:58:13,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:58:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:58:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2020-10-29 03:58:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:58:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-29 03:58:13,129 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 45 [2020-10-29 03:58:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:13,129 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-29 03:58:13,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:58:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-29 03:58:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:58:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:13,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:13,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:58:13,131 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 5 times [2020-10-29 03:58:13,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196752035] [2020-10-29 03:58:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:17,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4666 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:58:17,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:18,037 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-29 03:58:18,170 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-29 03:58:18,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:18,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:18,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:18,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:18,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:18,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:18,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:18,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:18,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:18,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:18,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:18,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:18,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:18,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:18,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:58:18,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196752035] [2020-10-29 03:58:18,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:18,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:58:18,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746046833] [2020-10-29 03:58:18,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:58:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:58:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:58:18,493 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 17 states. [2020-10-29 03:58:19,088 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-29 03:58:19,551 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-10-29 03:58:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:20,078 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2020-10-29 03:58:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:58:20,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-29 03:58:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:20,079 INFO L225 Difference]: With dead ends: 110 [2020-10-29 03:58:20,080 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:58:20,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:58:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:58:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2020-10-29 03:58:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:58:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-29 03:58:20,097 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 45 [2020-10-29 03:58:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:20,097 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-29 03:58:20,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:58:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-29 03:58:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:58:20,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:20,098 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:20,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:58:20,100 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2065594667, now seen corresponding path program 6 times [2020-10-29 03:58:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:20,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141497349] [2020-10-29 03:58:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:20,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:20,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:22,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:24,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:25,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:58:25,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:25,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:25,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:25,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:25,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:25,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:25,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:25,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:58:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141497349] [2020-10-29 03:58:25,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:25,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:58:25,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953293381] [2020-10-29 03:58:25,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:58:25,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:58:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:58:25,331 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 12 states. [2020-10-29 03:58:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:25,985 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-10-29 03:58:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:58:25,986 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:58:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:25,988 INFO L225 Difference]: With dead ends: 160 [2020-10-29 03:58:25,988 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:58:25,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:58:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:58:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-10-29 03:58:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:58:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-29 03:58:26,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 47 [2020-10-29 03:58:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:26,003 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-29 03:58:26,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:58:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-29 03:58:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:58:26,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:26,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:26,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:58:26,004 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1003714415, now seen corresponding path program 8 times [2020-10-29 03:58:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:26,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443985177] [2020-10-29 03:58:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:27,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:27,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:28,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:28,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:29,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:31,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:31,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:58:31,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:58:31,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:58:31,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:31,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:58:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:58:31,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:31,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:31,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:31,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:31,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:31,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:31,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:31,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:31,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:31,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:58:31,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443985177] [2020-10-29 03:58:31,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:31,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:58:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61858534] [2020-10-29 03:58:31,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:58:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:58:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:58:31,243 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 12 states. [2020-10-29 03:58:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:31,913 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-29 03:58:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:58:31,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:58:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:31,916 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:58:31,916 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:58:31,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:58:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:58:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2020-10-29 03:58:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:58:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-29 03:58:31,925 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 47 [2020-10-29 03:58:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:31,925 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-29 03:58:31,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:58:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-29 03:58:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:58:31,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:31,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:58:31,927 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-29 03:58:31,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:31,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000708010] [2020-10-29 03:58:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:31,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:35,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:36,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:58:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:58:36,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:37,753 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-29 03:58:38,199 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-29 03:58:38,384 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-29 03:58:38,608 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-29 03:58:38,789 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-29 03:58:38,990 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-29 03:58:39,175 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-29 03:58:39,369 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-29 03:58:41,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:41,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:41,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:41,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:41,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:41,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:41,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:41,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:41,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:41,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:41,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:41,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:41,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:41,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:58:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000708010] [2020-10-29 03:58:41,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:41,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:58:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244025408] [2020-10-29 03:58:41,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:58:41,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:58:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:58:41,053 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 32 states. [2020-10-29 03:58:42,225 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-29 03:58:42,543 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-29 03:58:43,613 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-29 03:58:44,693 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-29 03:58:45,163 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-29 03:58:45,531 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 03:58:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:45,994 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-29 03:58:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:58:45,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-29 03:58:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:45,996 INFO L225 Difference]: With dead ends: 89 [2020-10-29 03:58:45,997 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:58:45,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 03:58:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:58:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-29 03:58:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:58:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-29 03:58:46,009 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 52 [2020-10-29 03:58:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:46,009 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-29 03:58:46,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:58:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-29 03:58:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:58:46,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:46,010 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:46,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:58:46,011 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 7 times [2020-10-29 03:58:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:46,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641182952] [2020-10-29 03:58:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:51,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:58:51,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:58:51,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:51,465 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-29 03:58:51,632 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-29 03:58:52,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:52,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:52,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:52,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:52,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:58:52,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641182952] [2020-10-29 03:58:52,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:52,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:58:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518995794] [2020-10-29 03:58:52,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:58:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:58:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:58:52,286 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 18 states. [2020-10-29 03:58:52,939 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-29 03:58:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:53,740 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-29 03:58:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:58:53,741 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-29 03:58:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:53,742 INFO L225 Difference]: With dead ends: 97 [2020-10-29 03:58:53,742 INFO L226 Difference]: Without dead ends: 80 [2020-10-29 03:58:53,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:58:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-29 03:58:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-10-29 03:58:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 03:58:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-29 03:58:53,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 52 [2020-10-29 03:58:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:53,758 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-29 03:58:53,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:58:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-29 03:58:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:58:53,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:53,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:53,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:58:53,760 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 8 times [2020-10-29 03:58:53,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:53,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281257543] [2020-10-29 03:58:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:53,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:55,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:55,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:58,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:58:58,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:58:58,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:58:58,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:59,097 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-29 03:58:59,304 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-29 03:58:59,776 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-29 03:59:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:00,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:00,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:00,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:59:00,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281257543] [2020-10-29 03:59:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:59:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363685803] [2020-10-29 03:59:00,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:59:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:59:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:59:00,168 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 19 states. [2020-10-29 03:59:00,826 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-29 03:59:01,412 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 03:59:01,785 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-29 03:59:02,083 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 03:59:02,250 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-29 03:59:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:02,752 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-10-29 03:59:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:59:02,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-29 03:59:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:02,755 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:59:02,755 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:59:02,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:59:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:59:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-29 03:59:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 03:59:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-29 03:59:02,774 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 52 [2020-10-29 03:59:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:02,774 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-29 03:59:02,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:59:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-29 03:59:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:59:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:02,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:02,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:59:02,776 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 9 times [2020-10-29 03:59:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:02,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331436092] [2020-10-29 03:59:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:02,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:04,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:59:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:59:07,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:08,198 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-29 03:59:08,440 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-29 03:59:08,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:08,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:59:08,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331436092] [2020-10-29 03:59:08,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:08,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:59:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063737609] [2020-10-29 03:59:08,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:59:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:59:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:59:08,844 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 20 states. [2020-10-29 03:59:09,525 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-29 03:59:09,715 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-29 03:59:09,945 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-29 03:59:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:10,869 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2020-10-29 03:59:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:59:10,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-29 03:59:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:10,872 INFO L225 Difference]: With dead ends: 142 [2020-10-29 03:59:10,872 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 03:59:10,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:59:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 03:59:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2020-10-29 03:59:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 03:59:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-29 03:59:10,889 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 52 [2020-10-29 03:59:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:10,890 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-29 03:59:10,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:59:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-29 03:59:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:59:10,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:10,891 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:10,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:59:10,891 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash -843195386, now seen corresponding path program 10 times [2020-10-29 03:59:10,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:10,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19484820] [2020-10-29 03:59:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:12,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:15,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:15,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:59:15,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:59:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:59:15,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:15,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:59:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:59:15,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:16,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:16,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:16,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:16,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:16,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:16,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:16,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 03:59:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19484820] [2020-10-29 03:59:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:59:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177604828] [2020-10-29 03:59:16,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:59:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:59:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:59:16,146 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 14 states. [2020-10-29 03:59:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:16,927 INFO L93 Difference]: Finished difference Result 185 states and 217 transitions. [2020-10-29 03:59:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:59:16,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-29 03:59:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:16,929 INFO L225 Difference]: With dead ends: 185 [2020-10-29 03:59:16,929 INFO L226 Difference]: Without dead ends: 112 [2020-10-29 03:59:16,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:59:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-29 03:59:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2020-10-29 03:59:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 03:59:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-29 03:59:16,957 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 54 [2020-10-29 03:59:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:16,958 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-29 03:59:16,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:59:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-29 03:59:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:59:16,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:16,959 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:16,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:59:16,959 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 10 times [2020-10-29 03:59:16,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:16,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322515998] [2020-10-29 03:59:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:19,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:59:21,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:59:21,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:59:21,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:59:21,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:21,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:59:21,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:22,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:22,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:22,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:22,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:22,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:22,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:22,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:22,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 03:59:22,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322515998] [2020-10-29 03:59:22,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:22,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:59:22,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714140776] [2020-10-29 03:59:22,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:59:22,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:22,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:59:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:59:22,225 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 14 states. [2020-10-29 03:59:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:23,089 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-10-29 03:59:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:59:23,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-29 03:59:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:23,094 INFO L225 Difference]: With dead ends: 103 [2020-10-29 03:59:23,094 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 03:59:23,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:59:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 03:59:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-29 03:59:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:59:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-29 03:59:23,109 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 54 [2020-10-29 03:59:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:23,109 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-29 03:59:23,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:59:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-29 03:59:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:59:23,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:23,110 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:23,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:59:23,110 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 11 times [2020-10-29 03:59:23,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:23,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515427076] [2020-10-29 03:59:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:23,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:23,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 03:59:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:59:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:28,627 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-29 03:59:28,965 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-29 03:59:29,180 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-29 03:59:29,378 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-29 03:59:29,702 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-29 03:59:29,923 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-29 03:59:30,543 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-29 03:59:32,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:32,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:32,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:32,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 03:59:32,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515427076] [2020-10-29 03:59:32,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:32,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:59:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527774096] [2020-10-29 03:59:32,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:59:32,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:59:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1049, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:59:32,605 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 34 states. [2020-10-29 03:59:34,627 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 03:59:34,884 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-29 03:59:35,418 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 03:59:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:36,689 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-29 03:59:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:59:36,690 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2020-10-29 03:59:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:36,691 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:59:36,691 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:59:36,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 03:59:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:59:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-29 03:59:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:59:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-29 03:59:36,707 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 59 [2020-10-29 03:59:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:36,707 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-29 03:59:36,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:59:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-29 03:59:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:59:36,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:36,708 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:36,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:59:36,708 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 11 times [2020-10-29 03:59:36,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:36,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972442679] [2020-10-29 03:59:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:36,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:37,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:41,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:59:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:41,940 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-10-29 03:59:42,072 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-29 03:59:42,268 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-29 03:59:42,477 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-29 03:59:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:43,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:43,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:43,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:43,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:43,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:43,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:43,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:43,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:43,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:43,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 03:59:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972442679] [2020-10-29 03:59:43,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:43,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:59:43,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883244006] [2020-10-29 03:59:43,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:59:43,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:43,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:59:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:59:43,129 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 20 states. [2020-10-29 03:59:43,876 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-29 03:59:44,166 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-29 03:59:45,109 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 03:59:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:45,955 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-29 03:59:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:59:45,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-29 03:59:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:45,957 INFO L225 Difference]: With dead ends: 110 [2020-10-29 03:59:45,957 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:59:45,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:59:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:59:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-29 03:59:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:59:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-29 03:59:45,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 59 [2020-10-29 03:59:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:45,977 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-29 03:59:45,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:59:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-29 03:59:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:59:45,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:45,978 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:45,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:59:45,978 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 12 times [2020-10-29 03:59:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:45,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598898218] [2020-10-29 03:59:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:50,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:50,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:59:50,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:59:50,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:59:50,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:51,479 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-29 03:59:51,652 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2020-10-29 03:59:51,817 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-29 03:59:52,094 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-29 03:59:52,297 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-29 03:59:52,467 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-29 03:59:52,715 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-29 03:59:52,894 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-29 03:59:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:53,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:53,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:53,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:53,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:53,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:59:53,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598898218] [2020-10-29 03:59:53,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:53,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:59:53,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618977746] [2020-10-29 03:59:53,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:59:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:59:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:59:53,267 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 21 states. [2020-10-29 03:59:53,994 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-29 03:59:54,157 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-29 03:59:54,835 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-29 03:59:55,299 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-29 03:59:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:55,568 INFO L93 Difference]: Finished difference Result 157 states and 188 transitions. [2020-10-29 03:59:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:59:55,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 03:59:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:55,570 INFO L225 Difference]: With dead ends: 157 [2020-10-29 03:59:55,571 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 03:59:55,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:59:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 03:59:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-29 03:59:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 03:59:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2020-10-29 03:59:55,593 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 59 [2020-10-29 03:59:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:55,593 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2020-10-29 03:59:55,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:59:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2020-10-29 03:59:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:59:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:55,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:55,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:59:55,594 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 13 times [2020-10-29 03:59:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:55,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060657267] [2020-10-29 03:59:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:55,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:55,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:57,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:57,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:58,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:00,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:00:00,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:01,203 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 04:00:01,571 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-29 04:00:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:02,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:02,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:02,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:02,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 04:00:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:02,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 04:00:02,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060657267] [2020-10-29 04:00:02,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:02,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 04:00:02,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677798349] [2020-10-29 04:00:02,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 04:00:02,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:02,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 04:00:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:00:02,177 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand 21 states. [2020-10-29 04:00:02,795 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-29 04:00:02,962 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-29 04:00:03,174 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-29 04:00:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:04,078 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2020-10-29 04:00:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 04:00:04,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 04:00:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:04,082 INFO L225 Difference]: With dead ends: 180 [2020-10-29 04:00:04,082 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 04:00:04,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 04:00:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 04:00:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2020-10-29 04:00:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 04:00:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-29 04:00:04,111 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 59 [2020-10-29 04:00:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:04,111 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-29 04:00:04,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 04:00:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-29 04:00:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 04:00:04,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:04,113 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:04,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 04:00:04,113 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 14 times [2020-10-29 04:00:04,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:04,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090569512] [2020-10-29 04:00:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:04,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:06,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:07,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:09,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:09,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 04:00:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:09,905 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-29 04:00:10,268 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-29 04:00:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:10,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:10,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:10,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 04:00:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:10,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:10,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-29 04:00:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090569512] [2020-10-29 04:00:10,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:10,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 04:00:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009481320] [2020-10-29 04:00:10,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 04:00:10,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:10,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 04:00:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:00:10,765 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 23 states. [2020-10-29 04:00:11,384 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-29 04:00:11,557 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 04:00:11,778 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 04:00:12,062 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-29 04:00:12,252 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-29 04:00:12,442 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-29 04:00:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:13,173 INFO L93 Difference]: Finished difference Result 206 states and 245 transitions. [2020-10-29 04:00:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 04:00:13,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-29 04:00:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:13,176 INFO L225 Difference]: With dead ends: 206 [2020-10-29 04:00:13,177 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 04:00:13,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 04:00:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 04:00:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 129. [2020-10-29 04:00:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 04:00:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2020-10-29 04:00:13,213 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 59 [2020-10-29 04:00:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:13,213 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2020-10-29 04:00:13,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 04:00:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2020-10-29 04:00:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 04:00:13,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:13,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:13,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 04:00:13,215 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 12 times [2020-10-29 04:00:13,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:13,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003318485] [2020-10-29 04:00:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4706 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:00:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 04:00:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 04:00:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:18,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:18,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:18,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:18,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:18,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:00:18,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:18,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:18,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:18,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 04:00:18,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 04:00:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:18,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:18,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:18,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:18,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:18,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:00:18,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:18,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:18,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:18,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:18,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:18,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 04:00:18,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003318485] [2020-10-29 04:00:18,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:18,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:00:18,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203924432] [2020-10-29 04:00:18,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:00:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:18,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:00:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:00:18,285 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 16 states. [2020-10-29 04:00:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:19,213 INFO L93 Difference]: Finished difference Result 296 states and 356 transitions. [2020-10-29 04:00:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:00:19,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-29 04:00:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:19,216 INFO L225 Difference]: With dead ends: 296 [2020-10-29 04:00:19,216 INFO L226 Difference]: Without dead ends: 195 [2020-10-29 04:00:19,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:00:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-29 04:00:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 114. [2020-10-29 04:00:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 04:00:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2020-10-29 04:00:19,252 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 61 [2020-10-29 04:00:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:19,252 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2020-10-29 04:00:19,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:00:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2020-10-29 04:00:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 04:00:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:19,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:19,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 04:00:19,253 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 15 times [2020-10-29 04:00:19,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:19,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511348378] [2020-10-29 04:00:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:19,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:19,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:21,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:23,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 04:00:24,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:24,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:24,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:24,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 04:00:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:24,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:24,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 04:00:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511348378] [2020-10-29 04:00:24,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:24,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:00:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470197032] [2020-10-29 04:00:24,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:00:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:00:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:00:24,612 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand 16 states. [2020-10-29 04:00:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:25,865 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2020-10-29 04:00:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:00:25,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-29 04:00:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:25,868 INFO L225 Difference]: With dead ends: 166 [2020-10-29 04:00:25,868 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 04:00:25,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:00:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 04:00:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 70. [2020-10-29 04:00:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 04:00:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-29 04:00:25,887 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 61 [2020-10-29 04:00:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:25,887 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-29 04:00:25,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:00:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-29 04:00:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 04:00:25,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:25,888 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 04:00:25,888 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 13 times [2020-10-29 04:00:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:25,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337457262] [2020-10-29 04:00:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:28,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 04:00:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 04:00:30,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:31,511 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-29 04:00:31,674 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-29 04:00:31,883 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-29 04:00:32,140 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-29 04:00:32,359 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 04:00:32,642 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-29 04:00:32,974 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-29 04:00:33,265 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-29 04:00:33,611 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-29 04:00:33,988 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-29 04:00:34,294 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-29 04:00:34,668 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-29 04:00:35,086 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-29 04:00:35,438 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-29 04:00:35,719 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-29 04:00:35,948 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-29 04:00:36,170 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-29 04:00:36,394 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-29 04:00:36,685 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-29 04:00:36,943 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-29 04:00:37,202 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-29 04:00:37,478 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 04:00:37,773 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-29 04:00:38,047 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-29 04:00:38,276 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-29 04:00:38,505 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-29 04:00:38,776 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-29 04:00:39,018 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-29 04:00:39,271 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2020-10-29 04:00:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:39,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:39,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:39,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:39,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:00:39,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:39,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:39,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 04:00:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:39,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:39,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:39,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:39,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 04:00:39,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337457262] [2020-10-29 04:00:39,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:39,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 04:00:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838497086] [2020-10-29 04:00:39,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 04:00:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 04:00:39,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 04:00:39,926 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 41 states. [2020-10-29 04:00:40,522 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-10-29 04:00:40,743 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-29 04:00:40,965 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-29 04:00:41,376 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 27 [2020-10-29 04:00:41,940 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-29 04:00:42,642 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-29 04:00:42,851 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-29 04:00:43,125 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 04:00:43,439 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-29 04:00:43,848 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-29 04:00:44,074 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-29 04:00:44,342 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-29 04:00:44,814 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-29 04:00:45,075 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 04:00:45,502 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-29 04:00:45,763 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-29 04:00:46,418 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-29 04:00:46,706 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-10-29 04:00:47,029 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-29 04:00:47,513 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-29 04:00:47,819 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75