/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=SHALLOWEST --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/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:32:44,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:32:44,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:32:44,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:32:44,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:32:44,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:32:44,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:32:44,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:32:44,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:32:44,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:32:44,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:32:44,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:32:44,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:32:44,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:32:44,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:32:44,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:32:44,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:32:44,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:32:44,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:32:44,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:32:44,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:32:44,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:32:44,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:32:44,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:32:44,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:32:44,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:32:44,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:32:44,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:32:44,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:32:44,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:32:44,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:32:44,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:32:44,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:32:45,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:32:45,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:32:45,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:32:45,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:32:45,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:32:45,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:32:45,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:32:45,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:32:45,009 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 [2020-10-27 01:32:45,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:32:45,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:32:45,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:32:45,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:32:45,060 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:32:45,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:32:45,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:32:45,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:32:45,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:32:45,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:32:45,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:32:45,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:32:45,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:32:45,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:32:45,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:32:45,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:32:45,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:32:45,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:32:45,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:32:45,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:32:45,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:32:45,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:32:45,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:32:45,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:32:45,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:32:45,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:32:45,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:32:45,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:32:45,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:32:45,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:32:45,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:32:45,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:32:45,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:32:45,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:32:45,575 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:32:45,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-27 01:32:45,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb12df09/cb814692b52b4368a36cb712a420cd2e/FLAG93f321714 [2020-10-27 01:32:46,369 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:32:46,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-27 01:32:46,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb12df09/cb814692b52b4368a36cb712a420cd2e/FLAG93f321714 [2020-10-27 01:32:46,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb12df09/cb814692b52b4368a36cb712a420cd2e [2020-10-27 01:32:46,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:32:46,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:32:46,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:32:46,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:32:46,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:32:46,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:46,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@302bbb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46, skipping insertion in model container [2020-10-27 01:32:46,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:46,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:32:46,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:32:46,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:32:46,953 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:32:46,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:32:46,989 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:32:46,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46 WrapperNode [2020-10-27 01:32:46,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:32:46,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:32:46,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:32:46,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:32:47,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (1/1) ... [2020-10-27 01:32:47,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:32:47,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:32:47,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:32:47,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:32:47,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (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 [2020-10-27 01:32:47,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:32:47,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:32:47,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:32:47,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:32:47,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:32:47,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:32:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:32:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:32:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:32:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:32:47,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:32:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:32:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:32:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:32:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:32:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:32:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:32:47,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:32:47,652 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:32:47,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:32:47 BoogieIcfgContainer [2020-10-27 01:32:47,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:32:47,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:32:47,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:32:47,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:32:47,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:32:46" (1/3) ... [2020-10-27 01:32:47,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342a057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:32:47, skipping insertion in model container [2020-10-27 01:32:47,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:46" (2/3) ... [2020-10-27 01:32:47,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342a057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:32:47, skipping insertion in model container [2020-10-27 01:32:47,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:32:47" (3/3) ... [2020-10-27 01:32:47,672 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-27 01:32:47,708 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:32:47,714 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:32:47,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:32:47,777 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:32:47,777 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:32:47,777 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:32:47,778 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:32:47,778 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:32:47,778 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:32:47,778 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:32:47,778 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:32:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 01:32:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:32:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:47,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:47,818 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-27 01:32:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234770149] [2020-10-27 01:32:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:48,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:32:48,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 01:32:48,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:32:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:32:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:32:48,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:48,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:48,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:32:48,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:48,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:48,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234770149] [2020-10-27 01:32:48,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:32:48,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:32:48,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870721633] [2020-10-27 01:32:48,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:32:48,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:32:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:32:48,637 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-27 01:32:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:48,915 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-10-27 01:32:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:32:48,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:32:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:48,926 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:32:48,926 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:32:48,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:32:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:32:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 01:32:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:32:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:32:48,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:32:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:48,973 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:32:48,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:32:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:32:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:32:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:48,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:48,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:32:48,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-27 01:32:48,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:48,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880749060] [2020-10-27 01:32:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:49,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:32:49,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:32:49,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:32:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:32:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:49,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:49,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:49,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:49,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:32:49,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:32:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:49,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880749060] [2020-10-27 01:32:49,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:49,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:32:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781720547] [2020-10-27 01:32:49,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:32:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:32:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:32:49,441 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-27 01:32:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:49,647 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:32:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:32:49,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:32:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:49,649 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:32:49,649 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:32:49,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:32:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:32:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:32:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:32:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:32:49,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-27 01:32:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:49,658 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:32:49,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:32:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:32:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:32:49,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:49,660 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:49,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:32:49,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-27 01:32:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:49,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115252849] [2020-10-27 01:32:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:50,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:50,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:32:50,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:32:50,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-27 01:32:50,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:32:50,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:50,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:32:50,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:50,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:50,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:50,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:50,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:32:50,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115252849] [2020-10-27 01:32:50,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:50,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:32:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918116662] [2020-10-27 01:32:50,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:32:50,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:32:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:32:50,911 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 01:32:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:51,257 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-27 01:32:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:32:51,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:32:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:51,259 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:32:51,260 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:32:51,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:32:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:32:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 01:32:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:32:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-27 01:32:51,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-27 01:32:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:51,281 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-27 01:32:51,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:32:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-27 01:32:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:32:51,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:51,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:51,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:32:51,283 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash 843136401, now seen corresponding path program 3 times [2020-10-27 01:32:51,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:51,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783624902] [2020-10-27 01:32:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:51,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:52,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:32:52,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:32:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-27 01:32:52,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:32:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:32:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:52,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:52,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:52,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:52,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:32:52,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:52,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:52,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:32:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:52,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783624902] [2020-10-27 01:32:52,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:52,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:32:52,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638818505] [2020-10-27 01:32:52,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:32:52,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:32:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:32:52,478 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-27 01:32:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:52,880 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-27 01:32:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:32:52,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:32:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:52,883 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:32:52,883 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:32:52,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:32:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:32:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:32:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:32:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 01:32:52,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-27 01:32:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:52,898 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 01:32:52,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:32:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 01:32:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:32:52,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:52,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:52,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:32:52,900 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash 58704906, now seen corresponding path program 4 times [2020-10-27 01:32:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:52,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934373088] [2020-10-27 01:32:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:56,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:56,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:32:56,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:32:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3429 [2020-10-27 01:32:56,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:32:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:32:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:32:56,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:56,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:56,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:56,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:32:56,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:56,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:56,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934373088] [2020-10-27 01:32:56,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:56,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:32:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248594096] [2020-10-27 01:32:56,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:32:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:56,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:32:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:32:56,573 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-27 01:32:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:57,070 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-27 01:32:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:32:57,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 01:32:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:57,072 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:32:57,073 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:32:57,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:32:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:32:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 01:32:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:32:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-27 01:32:57,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-27 01:32:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:57,091 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-27 01:32:57,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:32:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-27 01:32:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:32:57,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:57,093 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:57,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:32:57,094 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -22905103, now seen corresponding path program 5 times [2020-10-27 01:32:57,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:57,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033909994] [2020-10-27 01:32:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:01,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:01,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:33:01,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:01,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:01,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:01,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:01,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:01,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:33:01,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:01,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:01,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:33:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:01,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033909994] [2020-10-27 01:33:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:01,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:33:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587335168] [2020-10-27 01:33:01,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:33:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:01,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:33:01,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:33:01,526 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-27 01:33:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:02,182 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-27 01:33:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:33:02,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:33:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:02,184 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:33:02,184 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:33:02,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:33:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:33:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 01:33:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:33:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 01:33:02,194 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-27 01:33:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 01:33:02,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:33:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 01:33:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:33:02,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:02,196 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:02,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:33:02,196 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -315193686, now seen corresponding path program 6 times [2020-10-27 01:33:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115601761] [2020-10-27 01:33:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:07,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:07,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:33:07,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:33:07,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:33:07,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:33:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:33:07,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:07,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:07,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:07,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:07,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115601761] [2020-10-27 01:33:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:07,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:33:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996504491] [2020-10-27 01:33:07,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:33:07,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:33:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:33:07,509 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-27 01:33:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:08,174 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-27 01:33:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:33:08,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:33:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:08,176 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:33:08,176 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:33:08,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:33:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:33:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-27 01:33:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:33:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 01:33:08,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-27 01:33:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:08,195 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 01:33:08,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:33:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 01:33:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:33:08,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:08,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:08,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:33:08,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:08,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1985660847, now seen corresponding path program 7 times [2020-10-27 01:33:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:08,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740278378] [2020-10-27 01:33:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:13,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:13,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:33:13,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:13,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:13,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:13,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:13,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:13,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740278378] [2020-10-27 01:33:13,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:13,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:33:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870501181] [2020-10-27 01:33:13,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:33:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:33:13,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:33:13,426 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-27 01:33:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:14,199 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-27 01:33:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:33:14,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:33:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:14,201 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:33:14,201 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:33:14,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:33:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:33:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 01:33:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:33:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-27 01:33:14,214 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-27 01:33:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:14,214 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-27 01:33:14,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:33:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-27 01:33:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:33:14,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:14,216 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:14,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:33:14,216 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1086795446, now seen corresponding path program 8 times [2020-10-27 01:33:14,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:14,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984219841] [2020-10-27 01:33:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:14,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:19,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:19,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:33:19,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:19,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:33:19,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:19,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:33:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:33:19,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:33:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:19,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:19,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:19,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:33:19,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:19,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:19,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984219841] [2020-10-27 01:33:19,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:19,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:33:19,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811553827] [2020-10-27 01:33:19,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:33:19,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:33:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:33:19,491 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 12 states. [2020-10-27 01:33:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:20,176 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-27 01:33:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:33:20,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 01:33:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:20,178 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:33:20,178 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:33:20,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:33:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:33:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-27 01:33:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:33:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:33:20,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-27 01:33:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:20,194 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:33:20,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:33:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:33:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:33:20,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:20,195 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:20,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:33:20,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2108724815, now seen corresponding path program 9 times [2020-10-27 01:33:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:20,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080080113] [2020-10-27 01:33:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:25,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:25,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080080113] [2020-10-27 01:33:25,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:25,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:33:25,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81379092] [2020-10-27 01:33:25,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:33:25,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:33:25,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:33:25,449 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 13 states. [2020-10-27 01:33:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:26,233 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-27 01:33:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:33:26,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 01:33:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:26,237 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:33:26,238 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:33:26,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:33:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:33:26,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-27 01:33:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:33:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-27 01:33:26,258 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-27 01:33:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:26,259 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-27 01:33:26,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:33:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-27 01:33:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:33:26,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:26,265 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:26,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:33:26,265 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 616604650, now seen corresponding path program 10 times [2020-10-27 01:33:26,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:26,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400134322] [2020-10-27 01:33:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:26,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:31,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:33:31,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:31,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:31,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:31,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:31,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:31,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:31,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:31,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400134322] [2020-10-27 01:33:31,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:31,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:33:31,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099455084] [2020-10-27 01:33:31,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:33:31,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:31,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:33:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:33:31,554 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 14 states. [2020-10-27 01:33:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:32,399 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 01:33:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:33:32,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:33:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:32,402 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:33:32,402 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:33:32,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:33:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:33:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-27 01:33:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:33:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 01:33:32,417 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-27 01:33:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:32,419 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 01:33:32,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:33:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 01:33:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:33:32,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:32,423 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:32,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:33:32,424 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1155067119, now seen corresponding path program 11 times [2020-10-27 01:33:32,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:32,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289046017] [2020-10-27 01:33:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:33,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:33,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:37,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:33:37,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:33:37,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:37,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:37,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:37,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:37,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:37,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:37,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289046017] [2020-10-27 01:33:37,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:37,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:33:37,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242063835] [2020-10-27 01:33:37,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:33:37,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:33:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:33:37,758 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 15 states. [2020-10-27 01:33:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:38,840 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-27 01:33:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:33:38,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 01:33:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:38,842 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:33:38,842 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:33:38,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:33:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:33:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 01:33:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:33:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-27 01:33:38,857 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-27 01:33:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:38,857 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-27 01:33:38,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:33:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-27 01:33:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:33:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:38,858 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:38,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:33:38,858 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash -175636854, now seen corresponding path program 12 times [2020-10-27 01:33:38,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:38,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42334093] [2020-10-27 01:33:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:43,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:33:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:33:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:43,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:43,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:43,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:43,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:43,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:43,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:43,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:43,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-27 01:33:43,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42334093] [2020-10-27 01:33:43,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:33:43,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:33:43,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486051228] [2020-10-27 01:33:43,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:33:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:33:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:33:43,949 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 4 states. [2020-10-27 01:33:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:44,029 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2020-10-27 01:33:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:33:44,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 01:33:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:44,030 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:33:44,030 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:33:44,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:33:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:33:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:33:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:33:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-27 01:33:44,048 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 48 [2020-10-27 01:33:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:44,048 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-27 01:33:44,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:33:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-27 01:33:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:33:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:44,049 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:44,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:33:44,050 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2049295358, now seen corresponding path program 1 times [2020-10-27 01:33:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:44,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027378125] [2020-10-27 01:33:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:44,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:49,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:33:49,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:33:49,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:49,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:49,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:49,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:49,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:49,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:49,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:49,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-27 01:33:49,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027378125] [2020-10-27 01:33:49,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:49,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:33:49,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704742955] [2020-10-27 01:33:49,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:33:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:33:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:33:49,176 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 5 states. [2020-10-27 01:33:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:49,296 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-27 01:33:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:33:49,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 01:33:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:49,298 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:33:49,298 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:33:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:33:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:33:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:33:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-27 01:33:49,320 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 60 [2020-10-27 01:33:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:49,320 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-27 01:33:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:33:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-27 01:33:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:33:49,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:49,322 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:49,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:33:49,322 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1304051446, now seen corresponding path program 2 times [2020-10-27 01:33:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:49,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350693581] [2020-10-27 01:33:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:49,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:54,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:33:54,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:33:54,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:33:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:33:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:54,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:54,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:54,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 111 proven. 3 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-27 01:33:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350693581] [2020-10-27 01:33:54,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:54,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:33:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801672908] [2020-10-27 01:33:54,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:33:54,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:33:54,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:33:54,459 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 6 states. [2020-10-27 01:33:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:54,641 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-27 01:33:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:33:54,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 01:33:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:54,642 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:33:54,642 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:33:54,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:33:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:33:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:33:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:33:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-10-27 01:33:54,668 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 72 [2020-10-27 01:33:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:54,669 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-10-27 01:33:54,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:33:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-10-27 01:33:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:33:54,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:54,670 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:54,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:33:54,671 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1981679742, now seen corresponding path program 3 times [2020-10-27 01:33:54,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:54,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493628851] [2020-10-27 01:33:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:59,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:59,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:33:59,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:33:59,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:33:59,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:33:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:33:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:59,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:59,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:59,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-10-27 01:33:59,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493628851] [2020-10-27 01:33:59,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:59,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:33:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160416983] [2020-10-27 01:33:59,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:33:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:33:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:59,826 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 7 states. [2020-10-27 01:34:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:00,053 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2020-10-27 01:34:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:00,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-27 01:34:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:00,056 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:34:00,056 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:34:00,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:34:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:34:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:34:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-27 01:34:00,100 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 84 [2020-10-27 01:34:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:00,101 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-27 01:34:00,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:34:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-27 01:34:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:34:00,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:00,110 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:00,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:34:00,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1186046858, now seen corresponding path program 4 times [2020-10-27 01:34:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399292488] [2020-10-27 01:34:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:00,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:04,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:05,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:05,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:05,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 287 proven. 10 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-27 01:34:05,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399292488] [2020-10-27 01:34:05,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:05,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:05,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213830738] [2020-10-27 01:34:05,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:05,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:05,332 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 8 states. [2020-10-27 01:34:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:05,711 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-10-27 01:34:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:05,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-27 01:34:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:05,713 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:34:05,713 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:34:05,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:34:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 01:34:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:34:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-10-27 01:34:05,751 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 96 [2020-10-27 01:34:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:05,751 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-10-27 01:34:05,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-10-27 01:34:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:34:05,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:05,752 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:05,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:34:05,753 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash -97211138, now seen corresponding path program 5 times [2020-10-27 01:34:05,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:05,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568899949] [2020-10-27 01:34:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:10,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:10,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:10,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:10,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:10,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:10,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:10,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:10,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:10,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 408 proven. 15 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2020-10-27 01:34:10,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568899949] [2020-10-27 01:34:10,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:10,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:10,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047000325] [2020-10-27 01:34:10,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:10,959 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 9 states. [2020-10-27 01:34:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:11,294 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2020-10-27 01:34:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:11,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-10-27 01:34:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:11,296 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:34:11,296 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:34:11,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:34:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-27 01:34:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:34:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2020-10-27 01:34:11,345 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 108 [2020-10-27 01:34:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:11,345 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2020-10-27 01:34:11,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2020-10-27 01:34:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:34:11,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:11,347 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:11,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:34:11,347 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash -990140918, now seen corresponding path program 6 times [2020-10-27 01:34:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:11,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897732837] [2020-10-27 01:34:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:34:16,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:34:16,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:34:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:16,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:16,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 551 proven. 21 refuted. 0 times theorem prover too weak. 3058 trivial. 0 not checked. [2020-10-27 01:34:16,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897732837] [2020-10-27 01:34:16,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:16,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:34:16,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191124688] [2020-10-27 01:34:16,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:34:16,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:34:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:16,578 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand 10 states. [2020-10-27 01:34:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:16,996 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-10-27 01:34:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:34:16,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2020-10-27 01:34:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:16,998 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:34:16,998 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:34:17,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:34:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-27 01:34:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:34:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2020-10-27 01:34:17,036 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 120 [2020-10-27 01:34:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:17,037 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2020-10-27 01:34:17,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:34:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2020-10-27 01:34:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 01:34:17,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:17,038 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:17,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:34:17,039 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -243682946, now seen corresponding path program 7 times [2020-10-27 01:34:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:17,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936132185] [2020-10-27 01:34:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 01:34:22,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:22,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:34:22,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:34:22,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:22,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:34:22,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:22,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 716 proven. 28 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-10-27 01:34:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936132185] [2020-10-27 01:34:22,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:22,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:34:22,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462637056] [2020-10-27 01:34:22,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:34:22,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:22,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:34:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:22,291 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand 11 states. [2020-10-27 01:34:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:22,744 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-27 01:34:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:34:22,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2020-10-27 01:34:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:22,746 INFO L225 Difference]: With dead ends: 263 [2020-10-27 01:34:22,746 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:34:22,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:34:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-27 01:34:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:34:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2020-10-27 01:34:22,787 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 132 [2020-10-27 01:34:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:22,788 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2020-10-27 01:34:22,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:34:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2020-10-27 01:34:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 01:34:22,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:22,789 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:22,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:34:22,790 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -447494006, now seen corresponding path program 8 times [2020-10-27 01:34:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:22,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796892992] [2020-10-27 01:34:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:27,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:27,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:28,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:28,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 903 proven. 36 refuted. 0 times theorem prover too weak. 4983 trivial. 0 not checked. [2020-10-27 01:34:28,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796892992] [2020-10-27 01:34:28,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:28,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:34:28,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320617094] [2020-10-27 01:34:28,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:34:28,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:28,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:34:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:34:28,064 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 12 states. [2020-10-27 01:34:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:28,626 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2020-10-27 01:34:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:34:28,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 144 [2020-10-27 01:34:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:28,629 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:34:28,629 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:34:28,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:34:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:34:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-27 01:34:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:34:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2020-10-27 01:34:28,672 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 144 [2020-10-27 01:34:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:28,673 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2020-10-27 01:34:28,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:34:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2020-10-27 01:34:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 01:34:28,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:28,675 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:28,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:34:28,675 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1057155586, now seen corresponding path program 9 times [2020-10-27 01:34:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:28,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120090299] [2020-10-27 01:34:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:28,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:34:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:33,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:33,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:33,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:33,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 1112 proven. 45 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2020-10-27 01:34:34,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120090299] [2020-10-27 01:34:34,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:34:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331353342] [2020-10-27 01:34:34,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:34:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:34:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:34,032 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand 13 states. [2020-10-27 01:34:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:34,666 INFO L93 Difference]: Finished difference Result 309 states and 344 transitions. [2020-10-27 01:34:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:34:34,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-10-27 01:34:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:34,671 INFO L225 Difference]: With dead ends: 309 [2020-10-27 01:34:34,671 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:34:34,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:34:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:34:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-27 01:34:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:34:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-27 01:34:34,717 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 156 [2020-10-27 01:34:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:34,717 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-27 01:34:34,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:34:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-27 01:34:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 01:34:34,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:34,719 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:34,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:34:34,720 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 10 times [2020-10-27 01:34:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:34,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628562578] [2020-10-27 01:34:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:34:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 01:34:36,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:36,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:36,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:36,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:36,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-27 01:34:36,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628562578] [2020-10-27 01:34:36,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:36,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:34:36,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777164530] [2020-10-27 01:34:36,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:34:36,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:36,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:34:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:34:36,890 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 18 states. [2020-10-27 01:34:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:38,340 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-27 01:34:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:34:38,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 168 [2020-10-27 01:34:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:38,341 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:34:38,341 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:34:38,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:34:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:34:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2020-10-27 01:34:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:34:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2020-10-27 01:34:38,399 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 168 [2020-10-27 01:34:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:38,400 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2020-10-27 01:34:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:34:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2020-10-27 01:34:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 01:34:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:38,402 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:38,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:34:38,402 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 279090417, now seen corresponding path program 11 times [2020-10-27 01:34:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:38,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769418133] [2020-10-27 01:34:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 01:34:41,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-27 01:34:41,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 01:34:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:41,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:41,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-27 01:34:41,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769418133] [2020-10-27 01:34:41,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:41,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:34:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457143208] [2020-10-27 01:34:41,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:34:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:34:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:41,520 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand 17 states. [2020-10-27 01:34:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:42,841 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-27 01:34:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:34:42,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-27 01:34:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:42,844 INFO L225 Difference]: With dead ends: 213 [2020-10-27 01:34:42,844 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 01:34:42,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:34:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 01:34:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-27 01:34:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 01:34:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-27 01:34:42,922 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 181 [2020-10-27 01:34:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:42,923 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-27 01:34:42,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:34:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-27 01:34:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 01:34:42,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:42,925 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:42,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:34:42,926 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 12 times [2020-10-27 01:34:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:42,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774393575] [2020-10-27 01:34:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3321 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 01:34:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:46,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:46,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-27 01:34:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774393575] [2020-10-27 01:34:47,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:47,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:34:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630441226] [2020-10-27 01:34:47,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:34:47,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:47,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:34:47,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:34:47,047 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 20 states. [2020-10-27 01:34:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:48,734 INFO L93 Difference]: Finished difference Result 226 states and 242 transitions. [2020-10-27 01:34:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:34:48,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 194 [2020-10-27 01:34:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:48,736 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:34:48,736 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:34:48,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:34:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:34:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2020-10-27 01:34:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 01:34:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2020-10-27 01:34:48,796 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 194 [2020-10-27 01:34:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:48,796 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2020-10-27 01:34:48,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:34:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2020-10-27 01:34:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 01:34:48,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:48,798 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:48,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:34:48,798 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1606877585, now seen corresponding path program 13 times [2020-10-27 01:34:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:48,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664138707] [2020-10-27 01:34:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:51,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:51,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 01:34:51,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2749 [2020-10-27 01:34:51,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:34:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-27 01:34:51,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:52,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:52,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:52,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-27 01:34:52,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664138707] [2020-10-27 01:34:52,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:52,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:34:52,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246862715] [2020-10-27 01:34:52,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:34:52,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:34:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:52,194 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand 19 states. [2020-10-27 01:34:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:53,785 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-27 01:34:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:34:53,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-27 01:34:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:53,787 INFO L225 Difference]: With dead ends: 239 [2020-10-27 01:34:53,788 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 01:34:53,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:34:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 01:34:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-27 01:34:53,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 01:34:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-27 01:34:53,857 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 207 [2020-10-27 01:34:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:53,857 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-27 01:34:53,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:34:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-27 01:34:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 01:34:53,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:53,860 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:53,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:34:53,861 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 14 times [2020-10-27 01:34:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:53,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870693858] [2020-10-27 01:34:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:54,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:57,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3228 [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:34:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 01:34:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:57,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:57,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:57,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:57,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:57,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-27 01:34:57,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870693858] [2020-10-27 01:34:57,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:57,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:34:57,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730967332] [2020-10-27 01:34:57,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:34:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:34:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:34:57,772 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 20 states. [2020-10-27 01:34:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:59,674 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-27 01:34:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:34:59,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 220 [2020-10-27 01:34:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:59,676 INFO L225 Difference]: With dead ends: 252 [2020-10-27 01:34:59,676 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 01:34:59,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:34:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 01:34:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2020-10-27 01:34:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:34:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 251 transitions. [2020-10-27 01:34:59,734 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 251 transitions. Word has length 220 [2020-10-27 01:34:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:59,735 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 251 transitions. [2020-10-27 01:34:59,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:34:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 251 transitions. [2020-10-27 01:34:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 01:34:59,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:59,736 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:59,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:34:59,737 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1336337969, now seen corresponding path program 15 times [2020-10-27 01:34:59,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:59,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975963376] [2020-10-27 01:34:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3221 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-27 01:35:03,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:03,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:03,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:03,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:03,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:03,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:03,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-27 01:35:03,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975963376] [2020-10-27 01:35:03,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:03,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:35:03,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85125657] [2020-10-27 01:35:03,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:35:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:35:03,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:35:03,659 INFO L87 Difference]: Start difference. First operand 234 states and 251 transitions. Second operand 21 states. [2020-10-27 01:35:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:05,607 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-27 01:35:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:35:05,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 233 [2020-10-27 01:35:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:05,610 INFO L225 Difference]: With dead ends: 265 [2020-10-27 01:35:05,610 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 01:35:05,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:35:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 01:35:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-27 01:35:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:35:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-27 01:35:05,686 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 233 [2020-10-27 01:35:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:05,687 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-27 01:35:05,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:35:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-27 01:35:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 01:35:05,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:05,689 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:05,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:35:05,689 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 16 times [2020-10-27 01:35:05,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:05,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238523253] [2020-10-27 01:35:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:10,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:10,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 01:35:10,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:35:10,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:10,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:35:10,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:10,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-27 01:35:10,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:11,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:11,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:11,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-27 01:35:11,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238523253] [2020-10-27 01:35:11,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:11,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:35:11,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560260675] [2020-10-27 01:35:11,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:35:11,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:35:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:35:11,513 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 24 states. [2020-10-27 01:35:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:14,118 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2020-10-27 01:35:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:35:14,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2020-10-27 01:35:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:14,121 INFO L225 Difference]: With dead ends: 278 [2020-10-27 01:35:14,121 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 01:35:14,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:35:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 01:35:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2020-10-27 01:35:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 01:35:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 279 transitions. [2020-10-27 01:35:14,201 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 279 transitions. Word has length 246 [2020-10-27 01:35:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:14,201 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 279 transitions. [2020-10-27 01:35:14,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:35:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 279 transitions. [2020-10-27 01:35:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-27 01:35:14,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:14,203 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:14,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:35:14,204 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 475808465, now seen corresponding path program 17 times [2020-10-27 01:35:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:14,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269205032] [2020-10-27 01:35:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:14,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4229 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-27 01:35:18,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:19,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:19,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:19,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:19,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-27 01:35:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269205032] [2020-10-27 01:35:19,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:19,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:35:19,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688751324] [2020-10-27 01:35:19,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:35:19,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:35:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:35:19,253 INFO L87 Difference]: Start difference. First operand 260 states and 279 transitions. Second operand 23 states. [2020-10-27 01:35:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:21,547 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-27 01:35:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:35:21,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 259 [2020-10-27 01:35:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:21,550 INFO L225 Difference]: With dead ends: 291 [2020-10-27 01:35:21,550 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 01:35:21,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:35:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 01:35:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-27 01:35:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 01:35:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-27 01:35:21,621 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 259 [2020-10-27 01:35:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:21,622 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-27 01:35:21,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:35:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-27 01:35:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 01:35:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:21,623 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:21,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:35:21,624 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 18 times [2020-10-27 01:35:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:21,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168714437] [2020-10-27 01:35:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:21,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:24,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:35:26,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:26,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-27 01:35:26,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-27 01:35:27,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168714437] [2020-10-27 01:35:27,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:27,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:35:27,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274269502] [2020-10-27 01:35:27,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:35:27,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:35:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:35:27,634 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 26 states. [2020-10-27 01:35:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:30,565 INFO L93 Difference]: Finished difference Result 304 states and 326 transitions. [2020-10-27 01:35:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:35:30,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 272 [2020-10-27 01:35:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:30,567 INFO L225 Difference]: With dead ends: 304 [2020-10-27 01:35:30,568 INFO L226 Difference]: Without dead ends: 298 [2020-10-27 01:35:30,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:35:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-27 01:35:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2020-10-27 01:35:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 01:35:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 307 transitions. [2020-10-27 01:35:30,657 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 307 transitions. Word has length 272 [2020-10-27 01:35:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:30,658 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 307 transitions. [2020-10-27 01:35:30,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:35:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 307 transitions. [2020-10-27 01:35:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 01:35:30,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:30,660 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:30,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:35:30,660 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1249831055, now seen corresponding path program 19 times [2020-10-27 01:35:30,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:30,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701940195] [2020-10-27 01:35:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:35,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-27 01:35:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:36,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-27 01:35:36,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701940195] [2020-10-27 01:35:36,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:36,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:35:36,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677313083] [2020-10-27 01:35:36,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:35:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:35:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:35:36,737 INFO L87 Difference]: Start difference. First operand 286 states and 307 transitions. Second operand 25 states. [2020-10-27 01:35:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:39,444 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-27 01:35:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:35:39,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 285 [2020-10-27 01:35:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:39,448 INFO L225 Difference]: With dead ends: 317 [2020-10-27 01:35:39,448 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 01:35:39,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:35:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 01:35:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-27 01:35:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 01:35:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-27 01:35:39,531 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 285 [2020-10-27 01:35:39,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:39,531 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-27 01:35:39,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:35:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-27 01:35:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 01:35:39,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:39,532 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:39,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:35:39,533 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 20 times [2020-10-27 01:35:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:39,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964983094] [2020-10-27 01:35:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:35:44,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-27 01:35:44,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:45,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-27 01:35:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964983094] [2020-10-27 01:35:45,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:45,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:35:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494483666] [2020-10-27 01:35:45,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:35:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:35:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:35:45,702 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 28 states. [2020-10-27 01:35:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:49,130 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2020-10-27 01:35:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:35:49,131 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 298 [2020-10-27 01:35:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:49,133 INFO L225 Difference]: With dead ends: 330 [2020-10-27 01:35:49,133 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 01:35:49,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:35:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 01:35:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2020-10-27 01:35:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 01:35:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 335 transitions. [2020-10-27 01:35:49,264 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 335 transitions. Word has length 298 [2020-10-27 01:35:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:49,264 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 335 transitions. [2020-10-27 01:35:49,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:35:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 335 transitions. [2020-10-27 01:35:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 01:35:49,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:49,266 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:49,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:35:49,267 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1580164113, now seen corresponding path program 21 times [2020-10-27 01:35:49,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:49,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628414790] [2020-10-27 01:35:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:49,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:54,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-27 01:35:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:55,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-27 01:35:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628414790] [2020-10-27 01:35:55,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:55,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:35:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332541280] [2020-10-27 01:35:55,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:35:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:35:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:35:55,460 INFO L87 Difference]: Start difference. First operand 312 states and 335 transitions. Second operand 27 states. [2020-10-27 01:35:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:58,598 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-27 01:35:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:35:58,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 311 [2020-10-27 01:35:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:58,600 INFO L225 Difference]: With dead ends: 343 [2020-10-27 01:35:58,600 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 01:35:58,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:35:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 01:35:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-27 01:35:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 01:35:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-27 01:35:58,689 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 311 [2020-10-27 01:35:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:58,690 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-27 01:35:58,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:35:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-27 01:35:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-27 01:35:58,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:58,692 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:58,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:35:58,692 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 22 times [2020-10-27 01:35:58,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:58,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169764174] [2020-10-27 01:35:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5157 [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:36:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:03,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-27 01:36:03,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:04,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:04,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-27 01:36:05,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169764174] [2020-10-27 01:36:05,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:05,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:36:05,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288895736] [2020-10-27 01:36:05,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:36:05,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:36:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:36:05,040 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-27 01:36:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:08,623 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2020-10-27 01:36:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:36:08,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-27 01:36:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:08,626 INFO L225 Difference]: With dead ends: 356 [2020-10-27 01:36:08,626 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 01:36:08,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:36:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 01:36:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 338. [2020-10-27 01:36:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 01:36:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2020-10-27 01:36:08,737 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 324 [2020-10-27 01:36:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:08,737 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2020-10-27 01:36:08,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:36:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2020-10-27 01:36:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 01:36:08,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:08,739 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:08,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:36:08,739 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:08,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1291921585, now seen corresponding path program 23 times [2020-10-27 01:36:08,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:08,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933042010] [2020-10-27 01:36:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:09,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-27 01:36:13,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:14,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:14,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:14,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-27 01:36:15,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933042010] [2020-10-27 01:36:15,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:15,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:36:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999472064] [2020-10-27 01:36:15,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:36:15,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:15,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:36:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:36:15,009 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand 29 states. [2020-10-27 01:36:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:18,863 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-27 01:36:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:36:18,864 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 337 [2020-10-27 01:36:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:18,867 INFO L225 Difference]: With dead ends: 369 [2020-10-27 01:36:18,867 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 01:36:18,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:36:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 01:36:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-27 01:36:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 01:36:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-27 01:36:19,025 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 337 [2020-10-27 01:36:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:19,025 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-27 01:36:19,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:36:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-27 01:36:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-27 01:36:19,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:19,028 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:19,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:36:19,029 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 24 times [2020-10-27 01:36:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:19,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082905201] [2020-10-27 01:36:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:24,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:24,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-27 01:36:24,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-27 01:36:24,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:25,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:25,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:25,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-27 01:36:25,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082905201] [2020-10-27 01:36:25,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:25,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:36:25,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055406546] [2020-10-27 01:36:25,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:36:25,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:25,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:36:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:36:25,683 INFO L87 Difference]: Start difference. First operand 351 states and 377 transitions. Second operand 30 states.