/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:06:26,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:06:26,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:06:26,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:06:26,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:06:26,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:06:26,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:06:27,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:06:27,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:06:27,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:06:27,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:06:27,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:06:27,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:06:27,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:06:27,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:06:27,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:06:27,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:06:27,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:06:27,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:06:27,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:06:27,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:06:27,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:06:27,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:06:27,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:06:27,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:06:27,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:06:27,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:06:27,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:06:27,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:06:27,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:06:27,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:06:27,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:06:27,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:06:27,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:06:27,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:06:27,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:06:27,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:06:27,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:06:27,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:06:27,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:06:27,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:06:27,078 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 [2020-10-28 09:06:27,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:06:27,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:06:27,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:06:27,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:06:27,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:06:27,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:06:27,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:06:27,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:06:27,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:06:27,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:06:27,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:06:27,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:06:27,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:06:27,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:06:27,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:06:27,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:06:27,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:06:27,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:06:27,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:06:27,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:06:27,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:06:27,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:06:27,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:06:27,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:06:27,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:06:27,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:06:27,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:06:27,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:06:27,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:06:27,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:06:27,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:06:27,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:06:27,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:06:27,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:06:27,540 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:06:27,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-28 09:06:27,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c8e157b9/1f6d420e6b214391b79641abb29e678d/FLAG967a69efa [2020-10-28 09:06:28,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:06:28,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-28 09:06:28,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c8e157b9/1f6d420e6b214391b79641abb29e678d/FLAG967a69efa [2020-10-28 09:06:28,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c8e157b9/1f6d420e6b214391b79641abb29e678d [2020-10-28 09:06:28,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:06:28,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:06:28,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:28,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:06:28,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:06:28,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10318454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28, skipping insertion in model container [2020-10-28 09:06:28,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:06:28,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:06:28,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:28,866 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:06:28,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:28,911 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:06:28,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28 WrapperNode [2020-10-28 09:06:28,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:28,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:06:28,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:06:28,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:06:28,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:06:28,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:06:28,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:06:28,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:06:28,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (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 [2020-10-28 09:06:29,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:06:29,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:06:29,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:06:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:06:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:06:29,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:06:29,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:06:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:06:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:06:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:06:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:06:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:06:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:06:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:06:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:06:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:06:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:06:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:06:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:06:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:06:29,726 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:06:29,726 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 09:06:29,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:29 BoogieIcfgContainer [2020-10-28 09:06:29,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:06:29,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:06:29,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:06:29,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:06:29,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:06:28" (1/3) ... [2020-10-28 09:06:29,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42971dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:29, skipping insertion in model container [2020-10-28 09:06:29,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28" (2/3) ... [2020-10-28 09:06:29,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42971dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:29, skipping insertion in model container [2020-10-28 09:06:29,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:29" (3/3) ... [2020-10-28 09:06:29,745 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-10-28 09:06:29,760 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:06:29,767 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:06:29,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:06:29,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:06:29,831 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:06:29,831 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:06:29,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:06:29,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:06:29,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:06:29,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:06:29,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:06:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:06:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:06:29,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:29,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:29,865 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -573141084, now seen corresponding path program 1 times [2020-10-28 09:06:29,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:29,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542974474] [2020-10-28 09:06:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:30,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:06:30,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:30,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-28 09:06:30,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:30,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:30,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:30,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:06:30,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:06:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:30,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:30,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:30,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:06:30,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:30,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:30,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:30,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:30,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:30,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:30,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542974474] [2020-10-28 09:06:30,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:30,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:06:30,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185824911] [2020-10-28 09:06:30,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:30,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:30,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:30,860 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-28 09:06:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:31,144 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2020-10-28 09:06:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:31,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 09:06:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:31,156 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:06:31,157 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:06:31,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:06:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-28 09:06:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:06:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-28 09:06:31,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 17 [2020-10-28 09:06:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:31,216 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-28 09:06:31,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-28 09:06:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:06:31,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:31,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:31,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:06:31,220 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash -995054200, now seen corresponding path program 1 times [2020-10-28 09:06:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703909857] [2020-10-28 09:06:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:06:31,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:31,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 09:06:31,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:31,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:06:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:06:31,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:31,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:31,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:06:31,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:31,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 09:06:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:31,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703909857] [2020-10-28 09:06:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:06:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807216531] [2020-10-28 09:06:31,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:31,717 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 5 states. [2020-10-28 09:06:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:31,993 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-28 09:06:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:31,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 09:06:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:31,996 INFO L225 Difference]: With dead ends: 67 [2020-10-28 09:06:31,996 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:06:31,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:06:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 09:06:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:06:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-28 09:06:32,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 19 [2020-10-28 09:06:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:32,026 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-28 09:06:32,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-28 09:06:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 09:06:32,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:32,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:32,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:06:32,029 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1033637200, now seen corresponding path program 1 times [2020-10-28 09:06:32,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:32,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266314364] [2020-10-28 09:06:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 09:06:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-28 09:06:32,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:06:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:32,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:32,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:32,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:32,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:32,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266314364] [2020-10-28 09:06:32,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:32,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:06:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847712641] [2020-10-28 09:06:32,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:32,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:32,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:32,981 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 5 states. [2020-10-28 09:06:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:33,188 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2020-10-28 09:06:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:33,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 09:06:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:33,190 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:06:33,190 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:06:33,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:06:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-28 09:06:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:06:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-10-28 09:06:33,219 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 20 [2020-10-28 09:06:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:33,219 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-10-28 09:06:33,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-10-28 09:06:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:06:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:33,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:33,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:06:33,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:33,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1399951076, now seen corresponding path program 1 times [2020-10-28 09:06:33,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:33,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75332283] [2020-10-28 09:06:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:34,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:06:38,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:38,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:06:38,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:06:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:06:38,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:38,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:38,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:06:38,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75332283] [2020-10-28 09:06:38,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:38,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:06:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015302446] [2020-10-28 09:06:38,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:06:38,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:06:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:38,359 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 6 states. [2020-10-28 09:06:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:38,595 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2020-10-28 09:06:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:06:38,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 09:06:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:38,598 INFO L225 Difference]: With dead ends: 148 [2020-10-28 09:06:38,598 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:06:38,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:06:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-10-28 09:06:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:06:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-28 09:06:38,612 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 29 [2020-10-28 09:06:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:38,612 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-28 09:06:38,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:06:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-28 09:06:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 09:06:38,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:38,614 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:38,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:06:38,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1175078986, now seen corresponding path program 2 times [2020-10-28 09:06:38,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:38,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717941572] [2020-10-28 09:06:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:41,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:43,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:06:43,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:06:43,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:06:43,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:43,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:06:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 09:06:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:06:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:43,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:43,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:43,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:43,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:43,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:06:43,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717941572] [2020-10-28 09:06:43,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:43,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:06:43,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071382632] [2020-10-28 09:06:43,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:06:43,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:06:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:43,793 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 7 states. [2020-10-28 09:06:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:44,080 INFO L93 Difference]: Finished difference Result 178 states and 234 transitions. [2020-10-28 09:06:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:06:44,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 09:06:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:44,084 INFO L225 Difference]: With dead ends: 178 [2020-10-28 09:06:44,084 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:06:44,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:06:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-10-28 09:06:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 09:06:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2020-10-28 09:06:44,098 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 35 [2020-10-28 09:06:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:44,098 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2020-10-28 09:06:44,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:06:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2020-10-28 09:06:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:06:44,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:44,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:44,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:06:44,101 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2028249564, now seen corresponding path program 3 times [2020-10-28 09:06:44,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:44,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464556705] [2020-10-28 09:06:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:49,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:06:49,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:06:49,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:06:49,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:49,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:06:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:06:49,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:49,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:49,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:49,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:49,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:49,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:49,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:06:49,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464556705] [2020-10-28 09:06:49,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:49,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:06:49,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315822858] [2020-10-28 09:06:49,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:06:49,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:06:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:49,269 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand 8 states. [2020-10-28 09:06:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:49,547 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2020-10-28 09:06:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:06:49,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 09:06:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:49,549 INFO L225 Difference]: With dead ends: 208 [2020-10-28 09:06:49,549 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 09:06:49,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 09:06:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2020-10-28 09:06:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 09:06:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2020-10-28 09:06:49,564 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 41 [2020-10-28 09:06:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:49,564 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2020-10-28 09:06:49,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:06:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2020-10-28 09:06:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:06:49,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:49,566 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:49,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:06:49,567 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash -383085814, now seen corresponding path program 4 times [2020-10-28 09:06:49,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:49,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501951226] [2020-10-28 09:06:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:49,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:50,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:51,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:54,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:06:54,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:06:54,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:54,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:54,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:54,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:54,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:54,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:54,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:54,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:54,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:54,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:54,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:06:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501951226] [2020-10-28 09:06:54,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:54,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:06:54,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089211126] [2020-10-28 09:06:54,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:06:54,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:54,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:06:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:06:54,769 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand 9 states. [2020-10-28 09:06:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:55,064 INFO L93 Difference]: Finished difference Result 238 states and 314 transitions. [2020-10-28 09:06:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:06:55,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 09:06:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:55,066 INFO L225 Difference]: With dead ends: 238 [2020-10-28 09:06:55,066 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 09:06:55,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:06:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 09:06:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2020-10-28 09:06:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 09:06:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2020-10-28 09:06:55,094 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 47 [2020-10-28 09:06:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:55,094 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2020-10-28 09:06:55,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:06:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2020-10-28 09:06:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:06:55,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:55,098 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:55,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:06:55,101 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1738014052, now seen corresponding path program 5 times [2020-10-28 09:06:55,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:55,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099422497] [2020-10-28 09:06:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:55,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:55,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:57,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:00,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:07:00,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:00,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:07:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:00,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:00,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:00,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:00,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:00,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:07:00,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:00,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:00,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:00,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:00,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:00,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 09:07:00,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099422497] [2020-10-28 09:07:00,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:00,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:07:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302304452] [2020-10-28 09:07:00,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:07:00,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:07:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:00,317 INFO L87 Difference]: Start difference. First operand 139 states and 180 transitions. Second operand 10 states. [2020-10-28 09:07:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:00,569 INFO L93 Difference]: Finished difference Result 268 states and 354 transitions. [2020-10-28 09:07:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:07:00,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-28 09:07:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:00,571 INFO L225 Difference]: With dead ends: 268 [2020-10-28 09:07:00,571 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 09:07:00,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 09:07:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2020-10-28 09:07:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 09:07:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2020-10-28 09:07:00,584 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 53 [2020-10-28 09:07:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:00,584 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2020-10-28 09:07:00,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:07:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2020-10-28 09:07:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:07:00,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:00,587 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:00,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:07:00,587 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash 683871690, now seen corresponding path program 6 times [2020-10-28 09:07:00,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:00,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839308666] [2020-10-28 09:07:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:00,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:03,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:03,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:05,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:07:05,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:07:05,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:05,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:07:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:07:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:07:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:05,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:05,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:05,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 09:07:05,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839308666] [2020-10-28 09:07:05,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:05,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:07:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680965957] [2020-10-28 09:07:05,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:07:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:07:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:05,767 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand 11 states. [2020-10-28 09:07:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:06,055 INFO L93 Difference]: Finished difference Result 298 states and 394 transitions. [2020-10-28 09:07:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:07:06,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 09:07:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:06,058 INFO L225 Difference]: With dead ends: 298 [2020-10-28 09:07:06,058 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 09:07:06,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 09:07:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 175. [2020-10-28 09:07:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 09:07:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 228 transitions. [2020-10-28 09:07:06,069 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 228 transitions. Word has length 59 [2020-10-28 09:07:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:06,069 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 228 transitions. [2020-10-28 09:07:06,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:07:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 228 transitions. [2020-10-28 09:07:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:07:06,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:06,071 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:06,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:07:06,072 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash 279669924, now seen corresponding path program 7 times [2020-10-28 09:07:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:06,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417630225] [2020-10-28 09:07:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:11,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:11,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:07:11,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:07:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:07:11,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:11,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:11,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:11,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:11,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:11,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:11,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:11,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-28 09:07:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417630225] [2020-10-28 09:07:11,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:11,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:07:11,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813901704] [2020-10-28 09:07:11,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:07:11,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:07:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:11,328 INFO L87 Difference]: Start difference. First operand 175 states and 228 transitions. Second operand 12 states. [2020-10-28 09:07:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:11,568 INFO L93 Difference]: Finished difference Result 328 states and 434 transitions. [2020-10-28 09:07:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:07:11,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-28 09:07:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:11,570 INFO L225 Difference]: With dead ends: 328 [2020-10-28 09:07:11,570 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 09:07:11,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 09:07:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2020-10-28 09:07:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 09:07:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 252 transitions. [2020-10-28 09:07:11,586 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 252 transitions. Word has length 65 [2020-10-28 09:07:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:11,586 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 252 transitions. [2020-10-28 09:07:11,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:07:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 252 transitions. [2020-10-28 09:07:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:07:11,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:11,588 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:11,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:07:11,589 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 252688522, now seen corresponding path program 8 times [2020-10-28 09:07:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:11,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112991177] [2020-10-28 09:07:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:11,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:07:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:07:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:07:16,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:16,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:16,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:16,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:16,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:16,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:16,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-28 09:07:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112991177] [2020-10-28 09:07:16,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:16,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:07:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584669049] [2020-10-28 09:07:16,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:07:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:07:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:16,959 INFO L87 Difference]: Start difference. First operand 193 states and 252 transitions. Second operand 13 states. [2020-10-28 09:07:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:17,212 INFO L93 Difference]: Finished difference Result 358 states and 474 transitions. [2020-10-28 09:07:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:07:17,213 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-28 09:07:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:17,215 INFO L225 Difference]: With dead ends: 358 [2020-10-28 09:07:17,215 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 09:07:17,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 09:07:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 211. [2020-10-28 09:07:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 09:07:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-10-28 09:07:17,226 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 71 [2020-10-28 09:07:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:17,226 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-10-28 09:07:17,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:07:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-10-28 09:07:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:07:17,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:17,228 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:17,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:07:17,228 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 186231780, now seen corresponding path program 9 times [2020-10-28 09:07:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:17,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355042551] [2020-10-28 09:07:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:22,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:07:22,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:22,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:07:22,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:22,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:22,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:22,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:22,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:22,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:22,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:22,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 09:07:22,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355042551] [2020-10-28 09:07:22,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:22,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:07:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093162709] [2020-10-28 09:07:22,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:07:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:07:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:07:22,467 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-10-28 09:07:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:22,776 INFO L93 Difference]: Finished difference Result 388 states and 514 transitions. [2020-10-28 09:07:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:07:22,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-28 09:07:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:22,780 INFO L225 Difference]: With dead ends: 388 [2020-10-28 09:07:22,780 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 09:07:22,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:07:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 09:07:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2020-10-28 09:07:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 09:07:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 300 transitions. [2020-10-28 09:07:22,799 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 300 transitions. Word has length 77 [2020-10-28 09:07:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:22,800 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 300 transitions. [2020-10-28 09:07:22,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:07:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 300 transitions. [2020-10-28 09:07:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:07:22,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:22,812 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:22,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:07:22,812 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1498190666, now seen corresponding path program 10 times [2020-10-28 09:07:22,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:22,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976235782] [2020-10-28 09:07:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:07:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:07:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:07:27,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:28,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:28,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:28,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:28,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:28,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:28,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:28,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:28,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-28 09:07:28,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976235782] [2020-10-28 09:07:28,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:28,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:07:28,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658237322] [2020-10-28 09:07:28,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:07:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:07:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:07:28,084 INFO L87 Difference]: Start difference. First operand 229 states and 300 transitions. Second operand 15 states. [2020-10-28 09:07:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:28,364 INFO L93 Difference]: Finished difference Result 418 states and 554 transitions. [2020-10-28 09:07:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:07:28,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-10-28 09:07:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:28,367 INFO L225 Difference]: With dead ends: 418 [2020-10-28 09:07:28,367 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 09:07:28,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:07:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 09:07:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2020-10-28 09:07:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 09:07:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 324 transitions. [2020-10-28 09:07:28,390 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 324 transitions. Word has length 83 [2020-10-28 09:07:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:28,391 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 324 transitions. [2020-10-28 09:07:28,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:07:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 324 transitions. [2020-10-28 09:07:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:28,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:28,394 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:28,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:07:28,394 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1935230172, now seen corresponding path program 11 times [2020-10-28 09:07:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:28,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925045358] [2020-10-28 09:07:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:33,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:33,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 09:07:33,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:33,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:07:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:07:33,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:33,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:33,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:33,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 09:07:33,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925045358] [2020-10-28 09:07:33,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:33,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:07:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369396889] [2020-10-28 09:07:33,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:07:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:07:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:07:33,695 INFO L87 Difference]: Start difference. First operand 247 states and 324 transitions. Second operand 16 states. [2020-10-28 09:07:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:34,007 INFO L93 Difference]: Finished difference Result 448 states and 594 transitions. [2020-10-28 09:07:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:07:34,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2020-10-28 09:07:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:34,012 INFO L225 Difference]: With dead ends: 448 [2020-10-28 09:07:34,012 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 09:07:34,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:07:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 09:07:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2020-10-28 09:07:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-28 09:07:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 348 transitions. [2020-10-28 09:07:34,048 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 348 transitions. Word has length 89 [2020-10-28 09:07:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:34,048 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 348 transitions. [2020-10-28 09:07:34,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:07:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 348 transitions. [2020-10-28 09:07:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 09:07:34,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:34,050 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:34,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:07:34,050 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash 934649354, now seen corresponding path program 12 times [2020-10-28 09:07:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:34,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252181163] [2020-10-28 09:07:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:39,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:07:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 09:07:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:07:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:39,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:39,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:39,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:39,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:39,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:39,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:39,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:39,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:39,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:39,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-28 09:07:39,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252181163] [2020-10-28 09:07:39,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:39,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:07:39,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977374669] [2020-10-28 09:07:39,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:07:39,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:07:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:07:39,533 INFO L87 Difference]: Start difference. First operand 265 states and 348 transitions. Second operand 17 states. [2020-10-28 09:07:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:39,955 INFO L93 Difference]: Finished difference Result 478 states and 634 transitions. [2020-10-28 09:07:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:07:39,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 95 [2020-10-28 09:07:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:39,959 INFO L225 Difference]: With dead ends: 478 [2020-10-28 09:07:39,959 INFO L226 Difference]: Without dead ends: 297 [2020-10-28 09:07:39,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:07:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-28 09:07:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 283. [2020-10-28 09:07:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-28 09:07:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 372 transitions. [2020-10-28 09:07:39,995 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 372 transitions. Word has length 95 [2020-10-28 09:07:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:39,996 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 372 transitions. [2020-10-28 09:07:39,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:07:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 372 transitions. [2020-10-28 09:07:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:07:39,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:39,997 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:39,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:07:39,997 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1206478236, now seen corresponding path program 13 times [2020-10-28 09:07:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:39,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152279704] [2020-10-28 09:07:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:40,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:07:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:45,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:45,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:45,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:45,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:45,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-28 09:07:45,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152279704] [2020-10-28 09:07:45,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:45,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:07:45,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806709762] [2020-10-28 09:07:45,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:07:45,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:07:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:07:45,356 INFO L87 Difference]: Start difference. First operand 283 states and 372 transitions. Second operand 18 states. [2020-10-28 09:07:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:45,714 INFO L93 Difference]: Finished difference Result 508 states and 674 transitions. [2020-10-28 09:07:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:07:45,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-10-28 09:07:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:45,717 INFO L225 Difference]: With dead ends: 508 [2020-10-28 09:07:45,717 INFO L226 Difference]: Without dead ends: 315 [2020-10-28 09:07:45,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:07:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-28 09:07:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 301. [2020-10-28 09:07:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-28 09:07:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 396 transitions. [2020-10-28 09:07:45,735 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 396 transitions. Word has length 101 [2020-10-28 09:07:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:45,735 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 396 transitions. [2020-10-28 09:07:45,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:07:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 396 transitions. [2020-10-28 09:07:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 09:07:45,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:45,737 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:45,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:07:45,737 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash 226941130, now seen corresponding path program 14 times [2020-10-28 09:07:45,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:45,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472895158] [2020-10-28 09:07:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:45,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5478 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:07:51,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:51,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:51,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:51,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:07:51,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472895158] [2020-10-28 09:07:51,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:51,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:07:51,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351099858] [2020-10-28 09:07:51,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:07:51,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:07:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:07:51,556 INFO L87 Difference]: Start difference. First operand 301 states and 396 transitions. Second operand 19 states. [2020-10-28 09:07:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:51,920 INFO L93 Difference]: Finished difference Result 538 states and 714 transitions. [2020-10-28 09:07:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:07:51,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2020-10-28 09:07:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:51,923 INFO L225 Difference]: With dead ends: 538 [2020-10-28 09:07:51,923 INFO L226 Difference]: Without dead ends: 333 [2020-10-28 09:07:51,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:07:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-28 09:07:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2020-10-28 09:07:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-28 09:07:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 420 transitions. [2020-10-28 09:07:51,942 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 420 transitions. Word has length 107 [2020-10-28 09:07:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:51,942 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 420 transitions. [2020-10-28 09:07:51,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:07:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 420 transitions. [2020-10-28 09:07:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:07:51,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:51,944 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:51,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:07:51,944 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash -584234588, now seen corresponding path program 15 times [2020-10-28 09:07:51,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:51,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004339521] [2020-10-28 09:07:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 09:07:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:07:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:57,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-28 09:07:57,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004339521] [2020-10-28 09:07:57,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:57,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:07:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128580161] [2020-10-28 09:07:57,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:07:57,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:57,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:07:57,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:07:57,397 INFO L87 Difference]: Start difference. First operand 319 states and 420 transitions. Second operand 20 states. [2020-10-28 09:07:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:57,842 INFO L93 Difference]: Finished difference Result 568 states and 754 transitions. [2020-10-28 09:07:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:07:57,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-28 09:07:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:57,845 INFO L225 Difference]: With dead ends: 568 [2020-10-28 09:07:57,845 INFO L226 Difference]: Without dead ends: 351 [2020-10-28 09:07:57,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:07:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-28 09:07:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 337. [2020-10-28 09:07:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-28 09:07:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 444 transitions. [2020-10-28 09:07:57,868 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 444 transitions. Word has length 113 [2020-10-28 09:07:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 444 transitions. [2020-10-28 09:07:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:07:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 444 transitions. [2020-10-28 09:07:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 09:07:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:57,871 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:07:57,871 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:57,872 INFO L82 PathProgramCache]: Analyzing trace with hash 821838730, now seen corresponding path program 16 times [2020-10-28 09:07:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959102902] [2020-10-28 09:07:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:02,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:08:02,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:08:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:03,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-28 09:08:03,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959102902] [2020-10-28 09:08:03,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:03,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:08:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255716371] [2020-10-28 09:08:03,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:08:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:08:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:08:03,278 INFO L87 Difference]: Start difference. First operand 337 states and 444 transitions. Second operand 21 states. [2020-10-28 09:08:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:03,713 INFO L93 Difference]: Finished difference Result 598 states and 794 transitions. [2020-10-28 09:08:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:08:03,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 119 [2020-10-28 09:08:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:03,716 INFO L225 Difference]: With dead ends: 598 [2020-10-28 09:08:03,716 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 09:08:03,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:08:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 09:08:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 355. [2020-10-28 09:08:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-28 09:08:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 468 transitions. [2020-10-28 09:08:03,735 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 468 transitions. Word has length 119 [2020-10-28 09:08:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:03,735 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 468 transitions. [2020-10-28 09:08:03,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:08:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 468 transitions. [2020-10-28 09:08:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:08:03,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:03,738 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:03,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:08:03,738 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1196504860, now seen corresponding path program 17 times [2020-10-28 09:08:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:03,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504591085] [2020-10-28 09:08:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:08:08,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 09:08:08,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:08:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:09,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:09,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:09,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:09,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-28 09:08:09,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504591085] [2020-10-28 09:08:09,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:09,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:08:09,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260192277] [2020-10-28 09:08:09,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:08:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:09,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:08:09,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:08:09,187 INFO L87 Difference]: Start difference. First operand 355 states and 468 transitions. Second operand 22 states. [2020-10-28 09:08:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:09,590 INFO L93 Difference]: Finished difference Result 628 states and 834 transitions. [2020-10-28 09:08:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:08:09,591 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-10-28 09:08:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:09,594 INFO L225 Difference]: With dead ends: 628 [2020-10-28 09:08:09,594 INFO L226 Difference]: Without dead ends: 387 [2020-10-28 09:08:09,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:08:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-28 09:08:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 373. [2020-10-28 09:08:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-28 09:08:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 492 transitions. [2020-10-28 09:08:09,618 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 492 transitions. Word has length 125 [2020-10-28 09:08:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:09,619 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 492 transitions. [2020-10-28 09:08:09,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:08:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 492 transitions. [2020-10-28 09:08:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 09:08:09,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:09,621 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:09,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:08:09,621 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1420698038, now seen corresponding path program 18 times [2020-10-28 09:08:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:09,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734332877] [2020-10-28 09:08:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5816 [2020-10-28 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:15,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:08:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 09:08:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:08:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:15,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:15,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-28 09:08:15,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734332877] [2020-10-28 09:08:15,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:15,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:08:15,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830562777] [2020-10-28 09:08:15,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:08:15,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:08:15,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:08:15,911 INFO L87 Difference]: Start difference. First operand 373 states and 492 transitions. Second operand 23 states. [2020-10-28 09:08:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:16,299 INFO L93 Difference]: Finished difference Result 658 states and 874 transitions. [2020-10-28 09:08:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:08:16,300 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 131 [2020-10-28 09:08:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:16,303 INFO L225 Difference]: With dead ends: 658 [2020-10-28 09:08:16,303 INFO L226 Difference]: Without dead ends: 405 [2020-10-28 09:08:16,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:08:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-28 09:08:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 391. [2020-10-28 09:08:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-28 09:08:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 516 transitions. [2020-10-28 09:08:16,326 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 516 transitions. Word has length 131 [2020-10-28 09:08:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:16,326 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 516 transitions. [2020-10-28 09:08:16,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:08:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 516 transitions. [2020-10-28 09:08:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:08:16,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:16,328 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:16,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:08:16,329 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1268836316, now seen corresponding path program 19 times [2020-10-28 09:08:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:16,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138815076] [2020-10-28 09:08:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:16,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:16,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:21,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:21,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:08:21,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 09:08:21,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:08:21,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:21,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:21,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-28 09:08:21,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138815076] [2020-10-28 09:08:21,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:21,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:08:21,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508621124] [2020-10-28 09:08:21,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:08:21,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:08:21,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:08:21,837 INFO L87 Difference]: Start difference. First operand 391 states and 516 transitions. Second operand 24 states. [2020-10-28 09:08:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:22,317 INFO L93 Difference]: Finished difference Result 688 states and 914 transitions. [2020-10-28 09:08:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:08:22,321 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2020-10-28 09:08:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:22,324 INFO L225 Difference]: With dead ends: 688 [2020-10-28 09:08:22,324 INFO L226 Difference]: Without dead ends: 423 [2020-10-28 09:08:22,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:08:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-28 09:08:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2020-10-28 09:08:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-28 09:08:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 540 transitions. [2020-10-28 09:08:22,346 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 540 transitions. Word has length 137 [2020-10-28 09:08:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:22,347 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 540 transitions. [2020-10-28 09:08:22,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:08:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 540 transitions. [2020-10-28 09:08:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 09:08:22,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:22,349 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:22,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:08:22,349 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:22,350 INFO L82 PathProgramCache]: Analyzing trace with hash -121394934, now seen corresponding path program 20 times [2020-10-28 09:08:22,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:22,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811560733] [2020-10-28 09:08:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:22,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5498 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:08:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:27,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 09:08:27,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:28,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:28,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:28,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-28 09:08:28,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811560733] [2020-10-28 09:08:28,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:28,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:08:28,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852217240] [2020-10-28 09:08:28,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:08:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:08:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:08:28,393 INFO L87 Difference]: Start difference. First operand 409 states and 540 transitions. Second operand 25 states. [2020-10-28 09:08:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:28,908 INFO L93 Difference]: Finished difference Result 718 states and 954 transitions. [2020-10-28 09:08:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:08:28,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 143 [2020-10-28 09:08:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:28,911 INFO L225 Difference]: With dead ends: 718 [2020-10-28 09:08:28,912 INFO L226 Difference]: Without dead ends: 441 [2020-10-28 09:08:28,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:08:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-28 09:08:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 427. [2020-10-28 09:08:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-28 09:08:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 564 transitions. [2020-10-28 09:08:28,933 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 564 transitions. Word has length 143 [2020-10-28 09:08:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:28,934 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 564 transitions. [2020-10-28 09:08:28,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:08:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 564 transitions. [2020-10-28 09:08:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 09:08:28,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:28,936 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:28,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:08:28,937 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 654456676, now seen corresponding path program 21 times [2020-10-28 09:08:28,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:28,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597401801] [2020-10-28 09:08:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:34,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:08:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:34,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:34,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:34,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-28 09:08:34,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597401801] [2020-10-28 09:08:34,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:34,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:08:34,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663006454] [2020-10-28 09:08:34,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:08:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:08:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:08:34,543 INFO L87 Difference]: Start difference. First operand 427 states and 564 transitions. Second operand 26 states. [2020-10-28 09:08:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:35,057 INFO L93 Difference]: Finished difference Result 748 states and 994 transitions. [2020-10-28 09:08:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:08:35,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-10-28 09:08:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:35,061 INFO L225 Difference]: With dead ends: 748 [2020-10-28 09:08:35,061 INFO L226 Difference]: Without dead ends: 459 [2020-10-28 09:08:35,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:08:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-28 09:08:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 445. [2020-10-28 09:08:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-10-28 09:08:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 588 transitions. [2020-10-28 09:08:35,091 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 588 transitions. Word has length 149 [2020-10-28 09:08:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 588 transitions. [2020-10-28 09:08:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:08:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 588 transitions. [2020-10-28 09:08:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 09:08:35,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:35,093 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:35,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:08:35,095 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -930241590, now seen corresponding path program 22 times [2020-10-28 09:08:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:35,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590943847] [2020-10-28 09:08:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:37,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:44,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:44,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9176 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:08:44,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:44,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:44,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:44,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:44,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:44,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:44,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-28 09:08:44,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590943847] [2020-10-28 09:08:44,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:44,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:08:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293720839] [2020-10-28 09:08:44,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:08:44,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:08:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:08:44,890 INFO L87 Difference]: Start difference. First operand 445 states and 588 transitions. Second operand 27 states. [2020-10-28 09:08:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:45,477 INFO L93 Difference]: Finished difference Result 778 states and 1034 transitions. [2020-10-28 09:08:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:08:45,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 155 [2020-10-28 09:08:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:45,481 INFO L225 Difference]: With dead ends: 778 [2020-10-28 09:08:45,482 INFO L226 Difference]: Without dead ends: 477 [2020-10-28 09:08:45,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:08:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-28 09:08:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 463. [2020-10-28 09:08:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-10-28 09:08:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 612 transitions. [2020-10-28 09:08:45,504 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 612 transitions. Word has length 155 [2020-10-28 09:08:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:45,504 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 612 transitions. [2020-10-28 09:08:45,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:08:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 612 transitions. [2020-10-28 09:08:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:08:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:45,506 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:45,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:08:45,507 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1805900124, now seen corresponding path program 23 times [2020-10-28 09:08:45,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:45,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059342063] [2020-10-28 09:08:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:50,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:08:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:51,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:51,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:51,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:51,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-28 09:08:51,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059342063] [2020-10-28 09:08:51,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:51,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:08:51,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138695518] [2020-10-28 09:08:51,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:08:51,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:08:51,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:08:51,222 INFO L87 Difference]: Start difference. First operand 463 states and 612 transitions. Second operand 28 states. [2020-10-28 09:08:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:51,753 INFO L93 Difference]: Finished difference Result 808 states and 1074 transitions. [2020-10-28 09:08:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:08:51,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 161 [2020-10-28 09:08:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:51,757 INFO L225 Difference]: With dead ends: 808 [2020-10-28 09:08:51,757 INFO L226 Difference]: Without dead ends: 495 [2020-10-28 09:08:51,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:08:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-28 09:08:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 481. [2020-10-28 09:08:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-28 09:08:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 636 transitions. [2020-10-28 09:08:51,783 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 636 transitions. Word has length 161 [2020-10-28 09:08:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:51,784 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 636 transitions. [2020-10-28 09:08:51,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:08:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 636 transitions. [2020-10-28 09:08:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 09:08:51,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:51,786 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:51,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:08:51,787 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1125396854, now seen corresponding path program 24 times [2020-10-28 09:08:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996545696] [2020-10-28 09:08:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:08:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 09:08:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 09:08:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:57,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:57,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:57,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:57,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:57,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:57,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:08:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-28 09:08:57,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996545696] [2020-10-28 09:08:57,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:57,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:08:57,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191395540] [2020-10-28 09:08:57,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:08:57,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:08:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:08:57,553 INFO L87 Difference]: Start difference. First operand 481 states and 636 transitions. Second operand 29 states. [2020-10-28 09:08:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:58,118 INFO L93 Difference]: Finished difference Result 838 states and 1114 transitions. [2020-10-28 09:08:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:08:58,119 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 167 [2020-10-28 09:08:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:58,123 INFO L225 Difference]: With dead ends: 838 [2020-10-28 09:08:58,123 INFO L226 Difference]: Without dead ends: 513 [2020-10-28 09:08:58,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:08:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-28 09:08:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 499. [2020-10-28 09:08:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-28 09:08:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 660 transitions. [2020-10-28 09:08:58,149 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 660 transitions. Word has length 167 [2020-10-28 09:08:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:58,149 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 660 transitions. [2020-10-28 09:08:58,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:08:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 660 transitions. [2020-10-28 09:08:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 09:08:58,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:58,152 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:58,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:08:58,152 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash -315562524, now seen corresponding path program 25 times [2020-10-28 09:08:58,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:58,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262935427] [2020-10-28 09:08:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:03,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:03,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 09:09:03,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:04,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:04,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:04,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:04,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-28 09:09:04,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262935427] [2020-10-28 09:09:04,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:04,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:09:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596334291] [2020-10-28 09:09:04,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:09:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:04,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:09:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:09:04,070 INFO L87 Difference]: Start difference. First operand 499 states and 660 transitions. Second operand 30 states. [2020-10-28 09:09:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:04,712 INFO L93 Difference]: Finished difference Result 868 states and 1154 transitions. [2020-10-28 09:09:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:09:04,713 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-10-28 09:09:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:04,716 INFO L225 Difference]: With dead ends: 868 [2020-10-28 09:09:04,716 INFO L226 Difference]: Without dead ends: 531 [2020-10-28 09:09:04,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:09:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-28 09:09:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 517. [2020-10-28 09:09:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-28 09:09:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 684 transitions. [2020-10-28 09:09:04,742 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 684 transitions. Word has length 173 [2020-10-28 09:09:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:04,743 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 684 transitions. [2020-10-28 09:09:04,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:09:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 684 transitions. [2020-10-28 09:09:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 09:09:04,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:04,745 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:04,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:09:04,745 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 723134794, now seen corresponding path program 26 times [2020-10-28 09:09:04,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:04,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851409682] [2020-10-28 09:09:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:09,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:09,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 09:09:09,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:09,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:09:09,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:09,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:09:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 09:09:09,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:10,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 09:09:10,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851409682] [2020-10-28 09:09:10,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:10,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:09:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392053860] [2020-10-28 09:09:10,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:09:10,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:10,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:09:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:09:10,545 INFO L87 Difference]: Start difference. First operand 517 states and 684 transitions. Second operand 31 states. [2020-10-28 09:09:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:11,196 INFO L93 Difference]: Finished difference Result 898 states and 1194 transitions. [2020-10-28 09:09:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:09:11,197 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 179 [2020-10-28 09:09:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:11,200 INFO L225 Difference]: With dead ends: 898 [2020-10-28 09:09:11,200 INFO L226 Difference]: Without dead ends: 549 [2020-10-28 09:09:11,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:09:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-28 09:09:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 535. [2020-10-28 09:09:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-28 09:09:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 708 transitions. [2020-10-28 09:09:11,236 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 708 transitions. Word has length 179 [2020-10-28 09:09:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:11,236 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 708 transitions. [2020-10-28 09:09:11,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:09:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 708 transitions. [2020-10-28 09:09:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 09:09:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:11,238 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:11,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:09:11,239 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash -817597148, now seen corresponding path program 27 times [2020-10-28 09:09:11,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:11,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785927633] [2020-10-28 09:09:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:11,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:16,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:16,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 09:09:16,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 09:09:16,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:16,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:09:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 09:09:16,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:17,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:17,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-28 09:09:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785927633] [2020-10-28 09:09:17,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:17,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:09:17,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31725116] [2020-10-28 09:09:17,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:09:17,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:09:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:09:17,127 INFO L87 Difference]: Start difference. First operand 535 states and 708 transitions. Second operand 32 states. [2020-10-28 09:09:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:17,663 INFO L93 Difference]: Finished difference Result 928 states and 1234 transitions. [2020-10-28 09:09:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:09:17,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 185 [2020-10-28 09:09:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:17,669 INFO L225 Difference]: With dead ends: 928 [2020-10-28 09:09:17,669 INFO L226 Difference]: Without dead ends: 567 [2020-10-28 09:09:17,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:09:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2020-10-28 09:09:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 553. [2020-10-28 09:09:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-28 09:09:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 732 transitions. [2020-10-28 09:09:17,698 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 732 transitions. Word has length 185 [2020-10-28 09:09:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:17,698 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 732 transitions. [2020-10-28 09:09:17,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:09:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 732 transitions. [2020-10-28 09:09:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 09:09:17,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:17,701 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:17,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:09:17,701 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash -615205878, now seen corresponding path program 28 times [2020-10-28 09:09:17,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:17,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310734643] [2020-10-28 09:09:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:17,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:22,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 09:09:22,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:23,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-28 09:09:23,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310734643] [2020-10-28 09:09:23,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:23,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:09:23,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132572771] [2020-10-28 09:09:23,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:09:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:09:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:09:23,635 INFO L87 Difference]: Start difference. First operand 553 states and 732 transitions. Second operand 33 states. [2020-10-28 09:09:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:24,357 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2020-10-28 09:09:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:09:24,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 191 [2020-10-28 09:09:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:24,362 INFO L225 Difference]: With dead ends: 958 [2020-10-28 09:09:24,362 INFO L226 Difference]: Without dead ends: 585 [2020-10-28 09:09:24,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:09:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-28 09:09:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 571. [2020-10-28 09:09:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-10-28 09:09:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 756 transitions. [2020-10-28 09:09:24,391 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 756 transitions. Word has length 191 [2020-10-28 09:09:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:24,391 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 756 transitions. [2020-10-28 09:09:24,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:09:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 756 transitions. [2020-10-28 09:09:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 09:09:24,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:24,394 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:24,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:09:24,395 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -983903132, now seen corresponding path program 29 times [2020-10-28 09:09:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:24,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952686361] [2020-10-28 09:09:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:24,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:29,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:09:29,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:29,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:09:29,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:30,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:30,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:30,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-28 09:09:30,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952686361] [2020-10-28 09:09:30,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:30,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:09:30,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712014658] [2020-10-28 09:09:30,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:09:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:09:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:09:30,415 INFO L87 Difference]: Start difference. First operand 571 states and 756 transitions. Second operand 34 states. [2020-10-28 09:09:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:31,030 INFO L93 Difference]: Finished difference Result 988 states and 1314 transitions. [2020-10-28 09:09:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:09:31,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 197 [2020-10-28 09:09:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:31,036 INFO L225 Difference]: With dead ends: 988 [2020-10-28 09:09:31,036 INFO L226 Difference]: Without dead ends: 603 [2020-10-28 09:09:31,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:09:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-28 09:09:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 589. [2020-10-28 09:09:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-10-28 09:09:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 780 transitions. [2020-10-28 09:09:31,063 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 780 transitions. Word has length 197 [2020-10-28 09:09:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:31,063 INFO L481 AbstractCegarLoop]: Abstraction has 589 states and 780 transitions. [2020-10-28 09:09:31,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:09:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 780 transitions. [2020-10-28 09:09:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 09:09:31,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:31,066 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:31,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:09:31,066 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash -925405494, now seen corresponding path program 30 times [2020-10-28 09:09:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:31,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508800854] [2020-10-28 09:09:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:36,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 09:09:36,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:37,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-28 09:09:37,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508800854] [2020-10-28 09:09:37,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:37,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:09:37,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449535282] [2020-10-28 09:09:37,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:09:37,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:09:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:09:37,144 INFO L87 Difference]: Start difference. First operand 589 states and 780 transitions. Second operand 35 states. [2020-10-28 09:09:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:37,882 INFO L93 Difference]: Finished difference Result 1018 states and 1354 transitions. [2020-10-28 09:09:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:09:37,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 203 [2020-10-28 09:09:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:37,887 INFO L225 Difference]: With dead ends: 1018 [2020-10-28 09:09:37,887 INFO L226 Difference]: Without dead ends: 621 [2020-10-28 09:09:37,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:09:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-28 09:09:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-10-28 09:09:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-10-28 09:09:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 804 transitions. [2020-10-28 09:09:37,917 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 804 transitions. Word has length 203 [2020-10-28 09:09:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:37,917 INFO L481 AbstractCegarLoop]: Abstraction has 607 states and 804 transitions. [2020-10-28 09:09:37,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:09:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 804 transitions. [2020-10-28 09:09:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 09:09:37,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:37,920 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:37,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:09:37,920 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2026372188, now seen corresponding path program 31 times [2020-10-28 09:09:37,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:37,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127345809] [2020-10-28 09:09:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:38,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:09:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 09:09:43,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:44,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-28 09:09:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127345809] [2020-10-28 09:09:44,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:09:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806068733] [2020-10-28 09:09:44,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:09:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:09:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:09:44,152 INFO L87 Difference]: Start difference. First operand 607 states and 804 transitions. Second operand 36 states. [2020-10-28 09:09:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:44,905 INFO L93 Difference]: Finished difference Result 1048 states and 1394 transitions. [2020-10-28 09:09:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:09:44,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 209 [2020-10-28 09:09:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:44,909 INFO L225 Difference]: With dead ends: 1048 [2020-10-28 09:09:44,909 INFO L226 Difference]: Without dead ends: 639 [2020-10-28 09:09:44,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:09:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-10-28 09:09:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 625. [2020-10-28 09:09:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-28 09:09:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 828 transitions. [2020-10-28 09:09:44,941 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 828 transitions. Word has length 209 [2020-10-28 09:09:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:44,941 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 828 transitions. [2020-10-28 09:09:44,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:09:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 828 transitions. [2020-10-28 09:09:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 09:09:44,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:44,944 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:44,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:09:44,944 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash -505521782, now seen corresponding path program 32 times [2020-10-28 09:09:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:44,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807122939] [2020-10-28 09:09:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:50,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 09:09:50,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:51,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:51,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:51,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:51,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-28 09:09:51,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807122939] [2020-10-28 09:09:51,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:51,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:09:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771369481] [2020-10-28 09:09:51,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:09:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:09:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:09:51,146 INFO L87 Difference]: Start difference. First operand 625 states and 828 transitions. Second operand 37 states. [2020-10-28 09:09:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:51,801 INFO L93 Difference]: Finished difference Result 1078 states and 1434 transitions. [2020-10-28 09:09:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:09:51,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 215 [2020-10-28 09:09:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:51,806 INFO L225 Difference]: With dead ends: 1078 [2020-10-28 09:09:51,806 INFO L226 Difference]: Without dead ends: 657 [2020-10-28 09:09:51,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:09:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-28 09:09:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 643. [2020-10-28 09:09:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-28 09:09:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 852 transitions. [2020-10-28 09:09:51,835 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 852 transitions. Word has length 215 [2020-10-28 09:09:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:51,836 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 852 transitions. [2020-10-28 09:09:51,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:09:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 852 transitions. [2020-10-28 09:09:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 09:09:51,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:51,838 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:51,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:09:51,838 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 966787812, now seen corresponding path program 33 times [2020-10-28 09:09:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:51,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229992634] [2020-10-28 09:09:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:57,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:57,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 09:09:57,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5340 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 09:09:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:58,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:58,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:58,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:58,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:58,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:58,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-28 09:09:58,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229992634] [2020-10-28 09:09:58,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:58,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:09:58,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776831192] [2020-10-28 09:09:58,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:09:58,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:09:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:09:58,348 INFO L87 Difference]: Start difference. First operand 643 states and 852 transitions. Second operand 38 states. [2020-10-28 09:09:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:59,192 INFO L93 Difference]: Finished difference Result 1108 states and 1474 transitions. [2020-10-28 09:09:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:09:59,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 221 [2020-10-28 09:09:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:59,197 INFO L225 Difference]: With dead ends: 1108 [2020-10-28 09:09:59,197 INFO L226 Difference]: Without dead ends: 675 [2020-10-28 09:09:59,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:09:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-28 09:09:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 661. [2020-10-28 09:09:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-10-28 09:09:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 876 transitions. [2020-10-28 09:09:59,225 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 876 transitions. Word has length 221 [2020-10-28 09:09:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 876 transitions. [2020-10-28 09:09:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:09:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 876 transitions. [2020-10-28 09:09:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 09:09:59,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:59,229 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:59,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:09:59,229 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -945458102, now seen corresponding path program 34 times [2020-10-28 09:09:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13817526] [2020-10-28 09:09:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:10:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:04,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 09:10:04,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:05,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:05,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:05,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-28 09:10:05,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13817526] [2020-10-28 09:10:05,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:10:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670069261] [2020-10-28 09:10:05,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:10:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:10:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:10:05,631 INFO L87 Difference]: Start difference. First operand 661 states and 876 transitions. Second operand 39 states. [2020-10-28 09:10:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:06,377 INFO L93 Difference]: Finished difference Result 1138 states and 1514 transitions. [2020-10-28 09:10:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:10:06,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 227 [2020-10-28 09:10:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:06,383 INFO L225 Difference]: With dead ends: 1138 [2020-10-28 09:10:06,383 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 09:10:06,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:10:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 09:10:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 679. [2020-10-28 09:10:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-10-28 09:10:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 900 transitions. [2020-10-28 09:10:06,414 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 900 transitions. Word has length 227 [2020-10-28 09:10:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:06,415 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 900 transitions. [2020-10-28 09:10:06,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:10:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 900 transitions. [2020-10-28 09:10:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-28 09:10:06,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:06,417 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:06,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:10:06,418 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1370041820, now seen corresponding path program 35 times [2020-10-28 09:10:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959182929] [2020-10-28 09:10:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:06,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:11,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 09:10:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:12,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:12,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:12,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:12,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-28 09:10:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959182929] [2020-10-28 09:10:12,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:12,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:10:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225729117] [2020-10-28 09:10:12,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:10:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:10:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:10:12,723 INFO L87 Difference]: Start difference. First operand 679 states and 900 transitions. Second operand 40 states. [2020-10-28 09:10:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:13,408 INFO L93 Difference]: Finished difference Result 1168 states and 1554 transitions. [2020-10-28 09:10:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:10:13,409 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 233 [2020-10-28 09:10:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:13,413 INFO L225 Difference]: With dead ends: 1168 [2020-10-28 09:10:13,413 INFO L226 Difference]: Without dead ends: 711 [2020-10-28 09:10:13,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:10:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-10-28 09:10:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 697. [2020-10-28 09:10:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-28 09:10:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 924 transitions. [2020-10-28 09:10:13,471 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 924 transitions. Word has length 233 [2020-10-28 09:10:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:13,472 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 924 transitions. [2020-10-28 09:10:13,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:10:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 924 transitions. [2020-10-28 09:10:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 09:10:13,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:13,474 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:13,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:10:13,475 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1905737974, now seen corresponding path program 36 times [2020-10-28 09:10:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:13,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865818211] [2020-10-28 09:10:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY