/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_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:02,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:02,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:03,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:03,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:03,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:03,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:03,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:03,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:03,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:03,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:03,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:03,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:03,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:03,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:03,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:03,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:03,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:03,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:03,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:03,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:03,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:03,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:03,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:03,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:03,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:03,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:03,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:03,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:03,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:03,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:03,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:03,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:03,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:03,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:03,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:03,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:03,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:03,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:03,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:03,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:03,093 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 08:51:03,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:03,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:03,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:03,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:03,123 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:03,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:03,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:03,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:03,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:03,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:03,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:03,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:03,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:03,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:03,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:03,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:03,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:03,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:03,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:03,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:03,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:03,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:03,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:03,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:03,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:03,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:03,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:03,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:03,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:03,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:03,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:03,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:03,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:03,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:03,583 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:03,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2020-10-28 08:51:03,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1781cbfb/334f391346de4ca9bfcaf47b96ea3c2d/FLAGc68cd4ecc [2020-10-28 08:51:04,227 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:04,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2020-10-28 08:51:04,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1781cbfb/334f391346de4ca9bfcaf47b96ea3c2d/FLAGc68cd4ecc [2020-10-28 08:51:04,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1781cbfb/334f391346de4ca9bfcaf47b96ea3c2d [2020-10-28 08:51:04,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:04,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:04,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:04,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:04,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:04,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:04" (1/1) ... [2020-10-28 08:51:04,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc022e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:04, skipping insertion in model container [2020-10-28 08:51:04,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:04" (1/1) ... [2020-10-28 08:51:04,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:04,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:04,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:04,958 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:05,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:05,015 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:05,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05 WrapperNode [2020-10-28 08:51:05,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:05,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:05,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:05,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:05,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (1/1) ... [2020-10-28 08:51:05,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:05,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:05,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:05,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:05,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (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 08:51:05,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:05,674 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:05,675 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 08:51:05,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:05 BoogieIcfgContainer [2020-10-28 08:51:05,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:05,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:05,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:05,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:05,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:04" (1/3) ... [2020-10-28 08:51:05,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88eb2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:05, skipping insertion in model container [2020-10-28 08:51:05,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:05" (2/3) ... [2020-10-28 08:51:05,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88eb2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:05, skipping insertion in model container [2020-10-28 08:51:05,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:05" (3/3) ... [2020-10-28 08:51:05,691 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2020-10-28 08:51:05,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:05,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:05,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:05,762 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:05,762 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:05,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:05,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:05,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:05,763 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:05,763 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:05,763 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 08:51:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:05,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,794 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 08:51:05,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1780932098, now seen corresponding path program 1 times [2020-10-28 08:51:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747410074] [2020-10-28 08:51:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:06,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 08:51:06,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:51:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:06,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:51:06,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,247 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 08:51:06,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747410074] [2020-10-28 08:51:06,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:06,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:06,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823363418] [2020-10-28 08:51:06,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:06,273 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 08:51:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:06,378 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2020-10-28 08:51:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:06,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 08:51:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:06,388 INFO L225 Difference]: With dead ends: 65 [2020-10-28 08:51:06,388 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:51:06,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:51:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:51:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:51:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 08:51:06,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2020-10-28 08:51:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:06,448 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 08:51:06,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 08:51:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:06,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:06,450 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 08:51:06,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:06,450 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386919, now seen corresponding path program 1 times [2020-10-28 08:51:06,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:06,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909495776] [2020-10-28 08:51:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:06,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:06,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 08:51:06,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:51:06,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:06,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,763 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 08:51:06,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909495776] [2020-10-28 08:51:06,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:06,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153096740] [2020-10-28 08:51:06,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:06,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:06,768 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-10-28 08:51:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:06,856 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-28 08:51:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:06,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 08:51:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:06,858 INFO L225 Difference]: With dead ends: 52 [2020-10-28 08:51:06,858 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:51:06,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:51:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 08:51:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:51:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-28 08:51:06,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-10-28 08:51:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:06,869 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-28 08:51:06,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-28 08:51:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:51:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:06,870 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 08:51:06,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:06,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -195365807, now seen corresponding path program 1 times [2020-10-28 08:51:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:06,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644874389] [2020-10-28 08:51:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:07,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:51:07,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 08:51:07,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:07,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:07,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:07,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:07,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 08:51:07,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:07,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:07,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:07,280 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 08:51:07,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644874389] [2020-10-28 08:51:07,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:07,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:07,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181001462] [2020-10-28 08:51:07,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:07,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:07,283 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-28 08:51:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:07,384 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-28 08:51:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:07,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 08:51:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:07,385 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:51:07,386 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:51:07,386 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 08:51:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:51:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 08:51:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:51:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-28 08:51:07,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2020-10-28 08:51:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:07,395 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-28 08:51:07,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-28 08:51:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:07,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:07,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:07,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:07,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1654589671, now seen corresponding path program 2 times [2020-10-28 08:51:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:07,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169596865] [2020-10-28 08:51:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:07,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:07,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-28 08:51:07,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:07,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:07,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:07,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:07,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:51:07,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:07,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:07,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:07,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:07,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:07,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:51:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169596865] [2020-10-28 08:51:07,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:07,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924822511] [2020-10-28 08:51:07,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:07,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:07,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:07,815 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2020-10-28 08:51:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:07,928 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-28 08:51:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:07,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 08:51:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:07,930 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:51:07,931 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:51:07,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:51:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-28 08:51:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:51:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-28 08:51:07,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2020-10-28 08:51:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:07,943 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-28 08:51:07,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-28 08:51:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:07,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:07,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:07,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:07,945 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash 632891431, now seen corresponding path program 1 times [2020-10-28 08:51:07,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:07,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201784636] [2020-10-28 08:51:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:08,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-28 08:51:08,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:08,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:08,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:08,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:51:08,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:08,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 08:51:08,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201784636] [2020-10-28 08:51:08,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:08,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779685357] [2020-10-28 08:51:08,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:08,464 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 4 states. [2020-10-28 08:51:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:08,544 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2020-10-28 08:51:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:08,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 08:51:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:08,545 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:51:08,546 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:51:08,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:51:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 08:51:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-28 08:51:08,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 23 [2020-10-28 08:51:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:08,554 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-28 08:51:08,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-28 08:51:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:51:08,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:08,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:08,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:08,556 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash 262058757, now seen corresponding path program 1 times [2020-10-28 08:51:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:08,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077120582] [2020-10-28 08:51:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:51:09,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-28 08:51:09,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:51:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:09,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:09,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:09,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:09,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:09,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:51:09,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077120582] [2020-10-28 08:51:09,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:09,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:09,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374692033] [2020-10-28 08:51:09,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:09,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:09,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:09,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:09,280 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 6 states. [2020-10-28 08:51:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:09,369 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-28 08:51:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:09,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 08:51:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:09,370 INFO L225 Difference]: With dead ends: 73 [2020-10-28 08:51:09,370 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:51:09,371 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 08:51:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:51:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-28 08:51:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:51:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-28 08:51:09,378 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2020-10-28 08:51:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:09,378 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-28 08:51:09,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-28 08:51:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:51:09,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:09,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:09,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:09,380 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1116711025, now seen corresponding path program 2 times [2020-10-28 08:51:09,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:09,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990785573] [2020-10-28 08:51:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:51:10,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-28 08:51:10,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:10,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:10,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:10,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:10,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:10,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:10,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:51:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990785573] [2020-10-28 08:51:10,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:10,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:10,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328349040] [2020-10-28 08:51:10,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:10,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:10,171 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 5 states. [2020-10-28 08:51:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:10,249 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-28 08:51:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:10,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 08:51:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:10,250 INFO L225 Difference]: With dead ends: 90 [2020-10-28 08:51:10,251 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:51:10,251 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 08:51:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:51:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 08:51:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:51:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-28 08:51:10,258 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2020-10-28 08:51:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:10,259 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-28 08:51:10,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-28 08:51:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 08:51:10,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:10,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:10,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:10,260 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1218168749, now seen corresponding path program 3 times [2020-10-28 08:51:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159194998] [2020-10-28 08:51:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 08:51:11,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:11,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-28 08:51:11,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:11,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:11,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:51:11,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:11,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:11,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159194998] [2020-10-28 08:51:11,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:11,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:11,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519878211] [2020-10-28 08:51:11,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:11,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:11,487 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 7 states. [2020-10-28 08:51:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:11,588 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2020-10-28 08:51:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:11,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-28 08:51:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:11,590 INFO L225 Difference]: With dead ends: 81 [2020-10-28 08:51:11,590 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 08:51:11,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 08:51:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-28 08:51:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:51:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-28 08:51:11,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 30 [2020-10-28 08:51:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:11,605 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-28 08:51:11,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-28 08:51:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:51:11,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:11,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:11,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:11,610 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:11,611 INFO L82 PathProgramCache]: Analyzing trace with hash 88307811, now seen corresponding path program 4 times [2020-10-28 08:51:11,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:11,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897780821] [2020-10-28 08:51:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:13,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:51:13,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:13,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-28 08:51:13,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:13,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 08:51:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:13,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:13,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:13,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:13,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897780821] [2020-10-28 08:51:13,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:13,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:13,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681095508] [2020-10-28 08:51:13,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:13,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:13,188 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 8 states. [2020-10-28 08:51:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:13,303 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-28 08:51:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:13,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 08:51:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:13,305 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:51:13,305 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:51:13,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:51:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-28 08:51:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:51:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-10-28 08:51:13,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 33 [2020-10-28 08:51:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:13,318 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-10-28 08:51:13,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-10-28 08:51:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:51:13,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:13,322 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:13,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:13,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash 337870419, now seen corresponding path program 5 times [2020-10-28 08:51:13,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:13,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239405907] [2020-10-28 08:51:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 08:51:15,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-28 08:51:15,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:15,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:15,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:15,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 08:51:15,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239405907] [2020-10-28 08:51:15,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:15,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:15,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211404227] [2020-10-28 08:51:15,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:15,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:15,361 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 6 states. [2020-10-28 08:51:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:15,455 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-28 08:51:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:15,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 08:51:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:15,456 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:51:15,457 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:51:15,457 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 08:51:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:51:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:51:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:51:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-10-28 08:51:15,467 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 36 [2020-10-28 08:51:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:15,467 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-10-28 08:51:15,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-10-28 08:51:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 08:51:15,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:15,470 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:15,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:15,470 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1822225355, now seen corresponding path program 6 times [2020-10-28 08:51:15,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:15,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446057294] [2020-10-28 08:51:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:18,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 08:51:18,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2513 [2020-10-28 08:51:18,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:18,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:51:18,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:18,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:18,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:18,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:18,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:18,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:18,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:18,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446057294] [2020-10-28 08:51:18,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:18,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:18,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709324574] [2020-10-28 08:51:18,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:18,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:18,126 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 9 states. [2020-10-28 08:51:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:18,237 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2020-10-28 08:51:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:18,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-28 08:51:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:18,240 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:51:18,240 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 08:51:18,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 08:51:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-28 08:51:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:51:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2020-10-28 08:51:18,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 38 [2020-10-28 08:51:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:18,257 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2020-10-28 08:51:18,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2020-10-28 08:51:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:51:18,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:18,261 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:18,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:18,261 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash 550928705, now seen corresponding path program 7 times [2020-10-28 08:51:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829709815] [2020-10-28 08:51:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:51:20,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:20,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2663 [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 08:51:20,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:21,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:21,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:21,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:21,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829709815] [2020-10-28 08:51:21,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:21,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:21,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842168533] [2020-10-28 08:51:21,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:21,060 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 10 states. [2020-10-28 08:51:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:21,176 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-10-28 08:51:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:21,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 08:51:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:21,178 INFO L225 Difference]: With dead ends: 101 [2020-10-28 08:51:21,178 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 08:51:21,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 08:51:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-28 08:51:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:51:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-28 08:51:21,190 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 41 [2020-10-28 08:51:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:21,191 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-28 08:51:21,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-28 08:51:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:51:21,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:21,192 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:21,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:21,192 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:21,193 INFO L82 PathProgramCache]: Analyzing trace with hash -273129291, now seen corresponding path program 8 times [2020-10-28 08:51:21,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:21,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600580671] [2020-10-28 08:51:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:51:24,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:24,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3089 [2020-10-28 08:51:24,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:24,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:24,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 08:51:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600580671] [2020-10-28 08:51:24,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:24,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502348218] [2020-10-28 08:51:24,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:24,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:24,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:24,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:24,419 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 7 states. [2020-10-28 08:51:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:24,507 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2020-10-28 08:51:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:24,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-28 08:51:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:24,508 INFO L225 Difference]: With dead ends: 142 [2020-10-28 08:51:24,509 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:51:24,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:51:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 08:51:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:51:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-10-28 08:51:24,524 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 44 [2020-10-28 08:51:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:24,524 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-10-28 08:51:24,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-10-28 08:51:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 08:51:24,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:24,527 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:24,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:24,527 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:24,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1434774679, now seen corresponding path program 9 times [2020-10-28 08:51:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:24,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652180017] [2020-10-28 08:51:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:28,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:51:28,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4183 [2020-10-28 08:51:28,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:28,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:51:28,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:28,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:28,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:28,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:28,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:28,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:28,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:28,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:28,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:51:28,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652180017] [2020-10-28 08:51:28,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:28,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236209831] [2020-10-28 08:51:28,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:28,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:28,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:28,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:28,856 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 11 states. [2020-10-28 08:51:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:28,982 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2020-10-28 08:51:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:28,982 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-28 08:51:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:28,983 INFO L225 Difference]: With dead ends: 109 [2020-10-28 08:51:28,984 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 08:51:28,984 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 08:51:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 08:51:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-28 08:51:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:51:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-10-28 08:51:28,990 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 46 [2020-10-28 08:51:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:28,990 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-10-28 08:51:28,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-10-28 08:51:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:51:28,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:28,991 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:28,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:28,992 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2062209633, now seen corresponding path program 10 times [2020-10-28 08:51:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:28,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616912452] [2020-10-28 08:51:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:29,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:33,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:51:33,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4492 [2020-10-28 08:51:33,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:33,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:33,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:33,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-28 08:51:33,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616912452] [2020-10-28 08:51:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854384046] [2020-10-28 08:51:33,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:33,583 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 8 states. [2020-10-28 08:51:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:33,692 INFO L93 Difference]: Finished difference Result 156 states and 198 transitions. [2020-10-28 08:51:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:33,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 08:51:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:33,694 INFO L225 Difference]: With dead ends: 156 [2020-10-28 08:51:33,695 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:51:33,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:51:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 08:51:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:51:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-28 08:51:33,705 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 49 [2020-10-28 08:51:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:33,705 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-28 08:51:33,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-28 08:51:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:51:33,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:33,706 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:33,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:33,707 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1844527363, now seen corresponding path program 11 times [2020-10-28 08:51:33,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:33,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138694171] [2020-10-28 08:51:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:33,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:51:38,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:38,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4332 [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 08:51:38,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:38,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:38,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:38,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138694171] [2020-10-28 08:51:38,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:38,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:51:38,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399890675] [2020-10-28 08:51:38,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:51:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:51:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:38,211 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 12 states. [2020-10-28 08:51:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:38,360 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2020-10-28 08:51:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:51:38,361 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 08:51:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:38,362 INFO L225 Difference]: With dead ends: 117 [2020-10-28 08:51:38,362 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 08:51:38,363 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 08:51:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 08:51:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-28 08:51:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:51:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2020-10-28 08:51:38,368 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 51 [2020-10-28 08:51:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:38,368 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2020-10-28 08:51:38,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:51:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2020-10-28 08:51:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 08:51:38,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:38,369 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:38,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:51:38,370 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1871739257, now seen corresponding path program 12 times [2020-10-28 08:51:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492999628] [2020-10-28 08:51:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 08:51:41,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3320 [2020-10-28 08:51:41,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:51:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:51:41,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:41,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:41,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492999628] [2020-10-28 08:51:41,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:41,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:51:41,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110835580] [2020-10-28 08:51:41,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:51:41,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:41,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:51:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:41,874 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 13 states. [2020-10-28 08:51:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:42,061 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2020-10-28 08:51:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:51:42,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-28 08:51:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:42,063 INFO L225 Difference]: With dead ends: 123 [2020-10-28 08:51:42,063 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:51:42,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:51:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-28 08:51:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 08:51:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-28 08:51:42,072 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 54 [2020-10-28 08:51:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:42,073 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-28 08:51:42,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:51:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-28 08:51:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:51:42,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:42,073 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:42,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:51:42,074 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1798626685, now seen corresponding path program 13 times [2020-10-28 08:51:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:42,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198332798] [2020-10-28 08:51:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:42,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4471 [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:46,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:46,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:46,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:46,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:46,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:46,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 08:51:46,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198332798] [2020-10-28 08:51:46,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:46,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:46,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923830247] [2020-10-28 08:51:46,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:46,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:46,665 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 9 states. [2020-10-28 08:51:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:46,807 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2020-10-28 08:51:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:46,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 08:51:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:46,808 INFO L225 Difference]: With dead ends: 182 [2020-10-28 08:51:46,808 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:51:46,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:51:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 08:51:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:51:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2020-10-28 08:51:46,816 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 57 [2020-10-28 08:51:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:46,817 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2020-10-28 08:51:46,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2020-10-28 08:51:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:51:46,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:46,818 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:46,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:51:46,819 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1557253925, now seen corresponding path program 14 times [2020-10-28 08:51:46,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:46,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088478016] [2020-10-28 08:51:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:49,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:51:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:52,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:52,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:51:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088478016] [2020-10-28 08:51:52,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:52,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:51:52,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863509733] [2020-10-28 08:51:52,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:51:52,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:51:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:52,087 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand 14 states. [2020-10-28 08:51:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:52,250 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2020-10-28 08:51:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:52,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-28 08:51:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:52,252 INFO L225 Difference]: With dead ends: 131 [2020-10-28 08:51:52,252 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:51:52,252 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 08:51:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:51:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-10-28 08:51:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:51:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2020-10-28 08:51:52,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 59 [2020-10-28 08:51:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:52,258 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2020-10-28 08:51:52,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:51:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2020-10-28 08:51:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 08:51:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:52,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:52,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:51:52,259 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 164909787, now seen corresponding path program 15 times [2020-10-28 08:51:52,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:52,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916526290] [2020-10-28 08:51:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:55,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 08:51:57,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:57,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:57,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:57,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-28 08:51:57,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916526290] [2020-10-28 08:51:57,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:57,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:57,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051857905] [2020-10-28 08:51:57,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:57,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:57,419 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 10 states. [2020-10-28 08:51:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:57,542 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2020-10-28 08:51:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:57,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-28 08:51:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:57,543 INFO L225 Difference]: With dead ends: 196 [2020-10-28 08:51:57,544 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:51:57,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:51:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:51:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:51:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2020-10-28 08:51:57,549 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 62 [2020-10-28 08:51:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:57,549 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2020-10-28 08:51:57,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2020-10-28 08:51:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:51:57,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:57,550 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:57,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:51:57,550 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash 673081917, now seen corresponding path program 16 times [2020-10-28 08:51:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:57,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728156891] [2020-10-28 08:51:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:00,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:52:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:52:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:52:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728156891] [2020-10-28 08:52:02,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:02,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:52:02,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094259283] [2020-10-28 08:52:02,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:52:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:52:02,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:02,795 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand 15 states. [2020-10-28 08:52:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:02,966 INFO L93 Difference]: Finished difference Result 139 states and 175 transitions. [2020-10-28 08:52:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:52:02,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-28 08:52:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:02,968 INFO L225 Difference]: With dead ends: 139 [2020-10-28 08:52:02,968 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 08:52:02,969 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 08:52:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 08:52:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-28 08:52:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:52:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2020-10-28 08:52:02,975 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 64 [2020-10-28 08:52:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:02,975 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2020-10-28 08:52:02,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:52:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2020-10-28 08:52:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:52:02,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:02,977 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:02,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:02,977 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 955909689, now seen corresponding path program 17 times [2020-10-28 08:52:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:02,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325241895] [2020-10-28 08:52:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 08:52:08,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:08,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:08,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:08,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:52:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:52:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325241895] [2020-10-28 08:52:08,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:08,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:08,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471329861] [2020-10-28 08:52:08,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:08,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:08,220 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 16 states. [2020-10-28 08:52:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:08,410 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2020-10-28 08:52:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:08,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-28 08:52:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:08,411 INFO L225 Difference]: With dead ends: 145 [2020-10-28 08:52:08,412 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:52:08,412 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 08:52:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:52:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-28 08:52:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:52:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 151 transitions. [2020-10-28 08:52:08,417 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 151 transitions. Word has length 67 [2020-10-28 08:52:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:08,417 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 151 transitions. [2020-10-28 08:52:08,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 151 transitions. [2020-10-28 08:52:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 08:52:08,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:08,418 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:08,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:08,419 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash -47769411, now seen corresponding path program 18 times [2020-10-28 08:52:08,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:08,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943141070] [2020-10-28 08:52:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:13,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:13,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-28 08:52:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943141070] [2020-10-28 08:52:13,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:13,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:13,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948542705] [2020-10-28 08:52:13,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:13,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:13,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:13,557 INFO L87 Difference]: Start difference. First operand 120 states and 151 transitions. Second operand 11 states. [2020-10-28 08:52:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:13,709 INFO L93 Difference]: Finished difference Result 222 states and 284 transitions. [2020-10-28 08:52:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:13,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 08:52:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:13,711 INFO L225 Difference]: With dead ends: 222 [2020-10-28 08:52:13,711 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:52:13,712 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 08:52:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:52:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 08:52:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:52:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2020-10-28 08:52:13,718 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 70 [2020-10-28 08:52:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:13,718 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2020-10-28 08:52:13,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2020-10-28 08:52:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 08:52:13,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:13,719 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:13,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:13,719 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 429698591, now seen corresponding path program 19 times [2020-10-28 08:52:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:13,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409364537] [2020-10-28 08:52:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:52:18,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:18,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409364537] [2020-10-28 08:52:18,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:18,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:52:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595392006] [2020-10-28 08:52:18,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:52:18,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:18,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:52:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:18,975 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand 17 states. [2020-10-28 08:52:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:19,187 INFO L93 Difference]: Finished difference Result 153 states and 193 transitions. [2020-10-28 08:52:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:52:19,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-28 08:52:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:19,189 INFO L225 Difference]: With dead ends: 153 [2020-10-28 08:52:19,189 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 08:52:19,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 08:52:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-10-28 08:52:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 08:52:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 161 transitions. [2020-10-28 08:52:19,199 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 161 transitions. Word has length 72 [2020-10-28 08:52:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 161 transitions. [2020-10-28 08:52:19,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:52:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 161 transitions. [2020-10-28 08:52:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:52:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:19,200 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:19,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:52:19,201 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 228040471, now seen corresponding path program 20 times [2020-10-28 08:52:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:19,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116932539] [2020-10-28 08:52:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:19,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:24,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 08:52:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:24,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:24,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:24,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:24,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:24,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:24,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:24,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116932539] [2020-10-28 08:52:24,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:24,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:52:24,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277247588] [2020-10-28 08:52:24,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:52:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:52:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:24,498 INFO L87 Difference]: Start difference. First operand 128 states and 161 transitions. Second operand 18 states. [2020-10-28 08:52:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:24,696 INFO L93 Difference]: Finished difference Result 159 states and 201 transitions. [2020-10-28 08:52:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:24,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-28 08:52:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:24,698 INFO L225 Difference]: With dead ends: 159 [2020-10-28 08:52:24,698 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 08:52:24,698 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 08:52:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 08:52:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-10-28 08:52:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 08:52:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2020-10-28 08:52:24,704 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 75 [2020-10-28 08:52:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:24,704 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2020-10-28 08:52:24,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:52:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2020-10-28 08:52:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 08:52:24,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:24,706 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:24,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:24,706 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1290234655, now seen corresponding path program 21 times [2020-10-28 08:52:24,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:24,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676489262] [2020-10-28 08:52:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:24,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:29,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:29,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:29,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:29,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:29,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:29,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:29,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 08:52:29,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676489262] [2020-10-28 08:52:29,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:29,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:29,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288642601] [2020-10-28 08:52:29,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:29,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:29,893 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand 12 states. [2020-10-28 08:52:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:30,055 INFO L93 Difference]: Finished difference Result 248 states and 318 transitions. [2020-10-28 08:52:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:52:30,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-28 08:52:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:30,056 INFO L225 Difference]: With dead ends: 248 [2020-10-28 08:52:30,056 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 08:52:30,057 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 08:52:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 08:52:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-28 08:52:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 08:52:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2020-10-28 08:52:30,064 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 78 [2020-10-28 08:52:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:30,064 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2020-10-28 08:52:30,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2020-10-28 08:52:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 08:52:30,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:30,065 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:30,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:52:30,066 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1154843007, now seen corresponding path program 22 times [2020-10-28 08:52:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:30,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540161667] [2020-10-28 08:52:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:35,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:52:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:35,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:35,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:35,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:35,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:52:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540161667] [2020-10-28 08:52:35,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:35,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:52:35,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410815063] [2020-10-28 08:52:35,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:52:35,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:52:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:35,394 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand 19 states. [2020-10-28 08:52:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:35,533 INFO L93 Difference]: Finished difference Result 167 states and 211 transitions. [2020-10-28 08:52:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:52:35,533 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-10-28 08:52:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:35,535 INFO L225 Difference]: With dead ends: 167 [2020-10-28 08:52:35,535 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 08:52:35,535 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 08:52:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 08:52:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-10-28 08:52:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 08:52:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2020-10-28 08:52:35,541 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 80 [2020-10-28 08:52:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:35,542 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2020-10-28 08:52:35,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:52:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2020-10-28 08:52:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:52:35,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:35,543 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:35,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:52:35,543 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:35,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1134844789, now seen corresponding path program 23 times [2020-10-28 08:52:35,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:35,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823869249] [2020-10-28 08:52:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:52:40,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:40,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:40,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-28 08:52:40,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823869249] [2020-10-28 08:52:40,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:40,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:40,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639074524] [2020-10-28 08:52:40,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:40,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:40,725 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand 13 states. [2020-10-28 08:52:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:40,880 INFO L93 Difference]: Finished difference Result 262 states and 336 transitions. [2020-10-28 08:52:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:40,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-10-28 08:52:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:40,882 INFO L225 Difference]: With dead ends: 262 [2020-10-28 08:52:40,882 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:52:40,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:52:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-28 08:52:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:52:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2020-10-28 08:52:40,889 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 83 [2020-10-28 08:52:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:40,890 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2020-10-28 08:52:40,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2020-10-28 08:52:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:52:40,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:40,891 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:40,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:52:40,891 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1519392083, now seen corresponding path program 24 times [2020-10-28 08:52:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:40,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919944602] [2020-10-28 08:52:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:40,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 08:52:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:46,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:52:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919944602] [2020-10-28 08:52:46,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:46,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:52:46,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952218595] [2020-10-28 08:52:46,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:52:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:52:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:46,232 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand 20 states. [2020-10-28 08:52:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:46,465 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2020-10-28 08:52:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:52:46,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-28 08:52:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:46,467 INFO L225 Difference]: With dead ends: 175 [2020-10-28 08:52:46,467 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 08:52:46,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 08:52:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-28 08:52:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 08:52:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2020-10-28 08:52:46,480 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 85 [2020-10-28 08:52:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:46,480 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2020-10-28 08:52:46,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:52:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2020-10-28 08:52:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 08:52:46,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:46,482 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:46,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:52:46,482 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:46,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1924037475, now seen corresponding path program 25 times [2020-10-28 08:52:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:46,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597442595] [2020-10-28 08:52:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 08:52:51,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 08:52:51,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:51,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:51,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:52:51,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597442595] [2020-10-28 08:52:51,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:51,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:52:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584423552] [2020-10-28 08:52:51,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:52:51,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:52:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:52:51,831 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand 21 states. [2020-10-28 08:52:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:52,021 INFO L93 Difference]: Finished difference Result 181 states and 229 transitions. [2020-10-28 08:52:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:52:52,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-10-28 08:52:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:52,024 INFO L225 Difference]: With dead ends: 181 [2020-10-28 08:52:52,024 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:52:52,025 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 08:52:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:52:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-28 08:52:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:52:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2020-10-28 08:52:52,030 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 197 transitions. Word has length 88 [2020-10-28 08:52:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:52,031 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 197 transitions. [2020-10-28 08:52:52,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:52:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 197 transitions. [2020-10-28 08:52:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:52:52,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:52,032 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:52,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:52:52,032 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 741710675, now seen corresponding path program 26 times [2020-10-28 08:52:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857194283] [2020-10-28 08:52:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:52,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:52:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:57,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:57,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-28 08:52:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857194283] [2020-10-28 08:52:57,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:57,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398160852] [2020-10-28 08:52:57,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:57,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:57,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:57,249 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 14 states. [2020-10-28 08:52:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:57,422 INFO L93 Difference]: Finished difference Result 288 states and 370 transitions. [2020-10-28 08:52:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:57,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 91 [2020-10-28 08:52:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:57,424 INFO L225 Difference]: With dead ends: 288 [2020-10-28 08:52:57,424 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 08:52:57,425 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 08:52:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 08:52:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-28 08:52:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 08:52:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 199 transitions. [2020-10-28 08:52:57,432 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 199 transitions. Word has length 91 [2020-10-28 08:52:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:57,432 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 199 transitions. [2020-10-28 08:52:57,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 199 transitions. [2020-10-28 08:52:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:52:57,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:57,434 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:57,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:52:57,434 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash 800102193, now seen corresponding path program 27 times [2020-10-28 08:52:57,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:57,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889652790] [2020-10-28 08:52:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:02,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:53:02,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:02,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 08:53:02,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:02,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:53:02,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889652790] [2020-10-28 08:53:02,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:02,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:53:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907544205] [2020-10-28 08:53:02,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:53:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:53:02,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:02,845 INFO L87 Difference]: Start difference. First operand 158 states and 199 transitions. Second operand 22 states. [2020-10-28 08:53:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:03,042 INFO L93 Difference]: Finished difference Result 189 states and 239 transitions. [2020-10-28 08:53:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:53:03,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-28 08:53:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:03,044 INFO L225 Difference]: With dead ends: 189 [2020-10-28 08:53:03,044 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 08:53:03,044 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 08:53:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 08:53:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2020-10-28 08:53:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:53:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 207 transitions. [2020-10-28 08:53:03,051 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 207 transitions. Word has length 93 [2020-10-28 08:53:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:03,051 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 207 transitions. [2020-10-28 08:53:03,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:53:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 207 transitions. [2020-10-28 08:53:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 08:53:03,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:03,053 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:03,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:03,053 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1150764229, now seen corresponding path program 28 times [2020-10-28 08:53:03,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:03,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97286669] [2020-10-28 08:53:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:03,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:08,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:08,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:08,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:08,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:08,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:08,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:08,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-28 08:53:08,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97286669] [2020-10-28 08:53:08,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:08,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:08,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957023867] [2020-10-28 08:53:08,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:08,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:08,291 INFO L87 Difference]: Start difference. First operand 164 states and 207 transitions. Second operand 15 states. [2020-10-28 08:53:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:08,467 INFO L93 Difference]: Finished difference Result 302 states and 388 transitions. [2020-10-28 08:53:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:08,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-10-28 08:53:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:08,469 INFO L225 Difference]: With dead ends: 302 [2020-10-28 08:53:08,469 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 08:53:08,470 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 08:53:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 08:53:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-28 08:53:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 08:53:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2020-10-28 08:53:08,484 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 96 [2020-10-28 08:53:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:08,485 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2020-10-28 08:53:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2020-10-28 08:53:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 08:53:08,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:08,487 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:08,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:08,487 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 680854439, now seen corresponding path program 29 times [2020-10-28 08:53:08,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166329636] [2020-10-28 08:53:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:08,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:53:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 08:53:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:13,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:13,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:13,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:13,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:13,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166329636] [2020-10-28 08:53:13,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:13,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:53:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556351917] [2020-10-28 08:53:13,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:53:13,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:53:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:53:13,924 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand 23 states. [2020-10-28 08:53:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:14,179 INFO L93 Difference]: Finished difference Result 197 states and 249 transitions. [2020-10-28 08:53:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:53:14,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-10-28 08:53:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:14,181 INFO L225 Difference]: With dead ends: 197 [2020-10-28 08:53:14,182 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 08:53:14,182 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 08:53:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 08:53:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-10-28 08:53:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 08:53:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 217 transitions. [2020-10-28 08:53:14,191 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 217 transitions. Word has length 98 [2020-10-28 08:53:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:14,192 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 217 transitions. [2020-10-28 08:53:14,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:53:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 217 transitions. [2020-10-28 08:53:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:53:14,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:14,194 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:14,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:53:14,194 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:14,194 INFO L82 PathProgramCache]: Analyzing trace with hash 578878607, now seen corresponding path program 30 times [2020-10-28 08:53:14,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:14,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866517544] [2020-10-28 08:53:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:14,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 08:53:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:19,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:19,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:19,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866517544] [2020-10-28 08:53:19,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:19,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:53:19,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222474816] [2020-10-28 08:53:19,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:53:19,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:19,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:53:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:19,658 INFO L87 Difference]: Start difference. First operand 172 states and 217 transitions. Second operand 24 states. [2020-10-28 08:53:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:19,924 INFO L93 Difference]: Finished difference Result 203 states and 257 transitions. [2020-10-28 08:53:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:53:19,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-10-28 08:53:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:19,926 INFO L225 Difference]: With dead ends: 203 [2020-10-28 08:53:19,927 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 08:53:19,929 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 08:53:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 08:53:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-10-28 08:53:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 08:53:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2020-10-28 08:53:19,939 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 101 [2020-10-28 08:53:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:19,940 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2020-10-28 08:53:19,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:53:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2020-10-28 08:53:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 08:53:19,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:19,943 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:19,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:53:19,943 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash -841254233, now seen corresponding path program 31 times [2020-10-28 08:53:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:19,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195328452] [2020-10-28 08:53:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:20,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:24,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 08:53:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:53:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:25,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:25,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:25,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:25,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:25,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:25,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:25,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:25,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-28 08:53:25,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195328452] [2020-10-28 08:53:25,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:25,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:53:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498885374] [2020-10-28 08:53:25,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:53:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:53:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:25,184 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand 16 states. [2020-10-28 08:53:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:25,367 INFO L93 Difference]: Finished difference Result 328 states and 422 transitions. [2020-10-28 08:53:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:53:25,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-10-28 08:53:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:25,370 INFO L225 Difference]: With dead ends: 328 [2020-10-28 08:53:25,370 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 08:53:25,371 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 08:53:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 08:53:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-10-28 08:53:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 08:53:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2020-10-28 08:53:25,377 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 104 [2020-10-28 08:53:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:25,377 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2020-10-28 08:53:25,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:53:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2020-10-28 08:53:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 08:53:25,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:25,379 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:25,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:53:25,379 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash 329594761, now seen corresponding path program 32 times [2020-10-28 08:53:25,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:25,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308125229] [2020-10-28 08:53:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:25,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:25,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:30,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 08:53:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:30,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:30,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308125229] [2020-10-28 08:53:30,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:30,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:53:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664345485] [2020-10-28 08:53:30,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:53:30,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:53:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:30,941 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand 25 states. [2020-10-28 08:53:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:31,177 INFO L93 Difference]: Finished difference Result 211 states and 267 transitions. [2020-10-28 08:53:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:53:31,178 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-10-28 08:53:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:31,180 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:53:31,180 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 08:53:31,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 08:53:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-28 08:53:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:53:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 235 transitions. [2020-10-28 08:53:31,187 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 235 transitions. Word has length 106 [2020-10-28 08:53:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:31,188 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 235 transitions. [2020-10-28 08:53:31,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:53:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 235 transitions. [2020-10-28 08:53:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 08:53:31,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:31,189 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:31,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:53:31,189 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1257855635, now seen corresponding path program 33 times [2020-10-28 08:53:31,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:31,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580903010] [2020-10-28 08:53:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 08:53:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:36,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:36,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:36,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:36,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580903010] [2020-10-28 08:53:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:53:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017831476] [2020-10-28 08:53:36,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:53:36,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:36,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:53:36,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:36,852 INFO L87 Difference]: Start difference. First operand 186 states and 235 transitions. Second operand 26 states. [2020-10-28 08:53:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:37,102 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2020-10-28 08:53:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:53:37,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2020-10-28 08:53:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:37,105 INFO L225 Difference]: With dead ends: 217 [2020-10-28 08:53:37,105 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 08:53:37,105 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 08:53:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 08:53:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-28 08:53:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 08:53:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 243 transitions. [2020-10-28 08:53:37,114 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 243 transitions. Word has length 109 [2020-10-28 08:53:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:37,114 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 243 transitions. [2020-10-28 08:53:37,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:53:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 243 transitions. [2020-10-28 08:53:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 08:53:37,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:37,116 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:37,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:53:37,116 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1107706615, now seen corresponding path program 34 times [2020-10-28 08:53:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:37,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957029862] [2020-10-28 08:53:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:42,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 08:53:42,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:42,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:53:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:42,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:42,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:42,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-28 08:53:42,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957029862] [2020-10-28 08:53:42,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:42,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:53:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093543122] [2020-10-28 08:53:42,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:53:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:53:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:42,418 INFO L87 Difference]: Start difference. First operand 192 states and 243 transitions. Second operand 17 states. [2020-10-28 08:53:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:42,609 INFO L93 Difference]: Finished difference Result 354 states and 456 transitions. [2020-10-28 08:53:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:53:42,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 08:53:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:42,611 INFO L225 Difference]: With dead ends: 354 [2020-10-28 08:53:42,611 INFO L226 Difference]: Without dead ends: 195 [2020-10-28 08:53:42,612 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 08:53:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-28 08:53:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-28 08:53:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 08:53:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 245 transitions. [2020-10-28 08:53:42,619 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 245 transitions. Word has length 112 [2020-10-28 08:53:42,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:42,619 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 245 transitions. [2020-10-28 08:53:42,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:53:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 245 transitions. [2020-10-28 08:53:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 08:53:42,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:42,621 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:42,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:53:42,621 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1353807851, now seen corresponding path program 35 times [2020-10-28 08:53:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:42,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232889364] [2020-10-28 08:53:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:47,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:47,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 08:53:47,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:48,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:48,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:48,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:48,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:53:48,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:48,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:48,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 08:53:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232889364] [2020-10-28 08:53:48,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:48,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:53:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498499476] [2020-10-28 08:53:48,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:53:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:53:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:53:48,204 INFO L87 Difference]: Start difference. First operand 194 states and 245 transitions. Second operand 27 states. [2020-10-28 08:53:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:48,483 INFO L93 Difference]: Finished difference Result 225 states and 285 transitions. [2020-10-28 08:53:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:53:48,484 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 114 [2020-10-28 08:53:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:48,486 INFO L225 Difference]: With dead ends: 225 [2020-10-28 08:53:48,486 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 08:53:48,487 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 08:53:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 08:53:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2020-10-28 08:53:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 08:53:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 253 transitions. [2020-10-28 08:53:48,493 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 253 transitions. Word has length 114 [2020-10-28 08:53:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:48,493 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 253 transitions. [2020-10-28 08:53:48,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:53:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 253 transitions. [2020-10-28 08:53:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:53:48,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:48,495 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:48,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:53:48,495 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -373362229, now seen corresponding path program 36 times [2020-10-28 08:53:48,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:48,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122669635] [2020-10-28 08:53:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:53,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:53:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:53,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:53,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:53,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:53,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:53,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:53,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:53,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:53,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:53,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-28 08:53:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122669635] [2020-10-28 08:53:53,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:53,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659731556] [2020-10-28 08:53:53,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:53,850 INFO L87 Difference]: Start difference. First operand 200 states and 253 transitions. Second operand 18 states. [2020-10-28 08:53:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:54,044 INFO L93 Difference]: Finished difference Result 368 states and 474 transitions. [2020-10-28 08:53:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:54,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2020-10-28 08:53:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:54,046 INFO L225 Difference]: With dead ends: 368 [2020-10-28 08:53:54,046 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 08:53:54,047 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 08:53:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 08:53:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-28 08:53:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 08:53:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 255 transitions. [2020-10-28 08:53:54,054 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 255 transitions. Word has length 117 [2020-10-28 08:53:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:54,055 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 255 transitions. [2020-10-28 08:53:54,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 255 transitions. [2020-10-28 08:53:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:53:54,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:54,056 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:54,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:53:54,056 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1483912233, now seen corresponding path program 37 times [2020-10-28 08:53:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:54,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334033852] [2020-10-28 08:53:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:54,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:54,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:59,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 08:53:59,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:59,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:59,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:59,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:59,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:59,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:53:59,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334033852] [2020-10-28 08:53:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:59,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:53:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450449537] [2020-10-28 08:53:59,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:53:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:53:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:53:59,747 INFO L87 Difference]: Start difference. First operand 202 states and 255 transitions. Second operand 28 states. [2020-10-28 08:54:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:00,052 INFO L93 Difference]: Finished difference Result 233 states and 295 transitions. [2020-10-28 08:54:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:54:00,053 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2020-10-28 08:54:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:00,054 INFO L225 Difference]: With dead ends: 233 [2020-10-28 08:54:00,055 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 08:54:00,055 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 08:54:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 08:54:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 208. [2020-10-28 08:54:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:54:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 263 transitions. [2020-10-28 08:54:00,064 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 263 transitions. Word has length 119 [2020-10-28 08:54:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:00,064 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 263 transitions. [2020-10-28 08:54:00,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:54:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 263 transitions. [2020-10-28 08:54:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 08:54:00,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:00,065 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:00,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:54:00,066 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1505780941, now seen corresponding path program 38 times [2020-10-28 08:54:00,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:00,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396184010] [2020-10-28 08:54:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:00,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 08:54:05,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-28 08:54:05,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:54:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 08:54:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:05,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:54:05,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396184010] [2020-10-28 08:54:05,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:05,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:54:05,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753356197] [2020-10-28 08:54:05,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:54:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:54:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:54:05,794 INFO L87 Difference]: Start difference. First operand 208 states and 263 transitions. Second operand 29 states. [2020-10-28 08:54:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:06,083 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2020-10-28 08:54:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:54:06,084 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 122 [2020-10-28 08:54:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:06,086 INFO L225 Difference]: With dead ends: 239 [2020-10-28 08:54:06,086 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 08:54:06,087 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 08:54:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 08:54:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2020-10-28 08:54:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-28 08:54:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 271 transitions. [2020-10-28 08:54:06,094 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 271 transitions. Word has length 122 [2020-10-28 08:54:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:06,094 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 271 transitions. [2020-10-28 08:54:06,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:54:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 271 transitions. [2020-10-28 08:54:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 08:54:06,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:06,096 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:06,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:54:06,096 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 161431977, now seen corresponding path program 39 times [2020-10-28 08:54:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:06,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201983292] [2020-10-28 08:54:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:06,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:54:11,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:11,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:54:11,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:11,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:11,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:11,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:11,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-28 08:54:11,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201983292] [2020-10-28 08:54:11,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:11,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:54:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428113753] [2020-10-28 08:54:11,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:54:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:11,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:54:11,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:54:11,525 INFO L87 Difference]: Start difference. First operand 214 states and 271 transitions. Second operand 19 states. [2020-10-28 08:54:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:11,723 INFO L93 Difference]: Finished difference Result 394 states and 508 transitions. [2020-10-28 08:54:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:54:11,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 125 [2020-10-28 08:54:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:11,725 INFO L225 Difference]: With dead ends: 394 [2020-10-28 08:54:11,725 INFO L226 Difference]: Without dead ends: 217 [2020-10-28 08:54:11,726 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 08:54:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-28 08:54:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2020-10-28 08:54:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-28 08:54:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 273 transitions. [2020-10-28 08:54:11,733 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 273 transitions. Word has length 125 [2020-10-28 08:54:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:11,733 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 273 transitions. [2020-10-28 08:54:11,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:54:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 273 transitions. [2020-10-28 08:54:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 08:54:11,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:11,735 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:11,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:54:11,735 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1653720583, now seen corresponding path program 40 times [2020-10-28 08:54:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773834954] [2020-10-28 08:54:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 08:54:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:17,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:17,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:17,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:54:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773834954] [2020-10-28 08:54:17,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:17,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:54:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780532813] [2020-10-28 08:54:17,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:54:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:54:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:17,416 INFO L87 Difference]: Start difference. First operand 216 states and 273 transitions. Second operand 30 states. [2020-10-28 08:54:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:17,711 INFO L93 Difference]: Finished difference Result 247 states and 313 transitions. [2020-10-28 08:54:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:54:17,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 127 [2020-10-28 08:54:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:17,714 INFO L225 Difference]: With dead ends: 247 [2020-10-28 08:54:17,714 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 08:54:17,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 08:54:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-28 08:54:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 08:54:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 281 transitions. [2020-10-28 08:54:17,720 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 281 transitions. Word has length 127 [2020-10-28 08:54:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:17,721 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 281 transitions. [2020-10-28 08:54:17,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:54:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 281 transitions. [2020-10-28 08:54:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 08:54:17,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:17,722 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:17,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:54:17,722 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash 794861103, now seen corresponding path program 41 times [2020-10-28 08:54:17,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:17,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422711049] [2020-10-28 08:54:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:54:22,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:54:22,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:23,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 08:54:23,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422711049] [2020-10-28 08:54:23,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:23,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:54:23,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883671035] [2020-10-28 08:54:23,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:54:23,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:54:23,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:23,130 INFO L87 Difference]: Start difference. First operand 222 states and 281 transitions. Second operand 20 states. [2020-10-28 08:54:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:23,267 INFO L93 Difference]: Finished difference Result 408 states and 526 transitions. [2020-10-28 08:54:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:54:23,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-10-28 08:54:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:23,270 INFO L225 Difference]: With dead ends: 408 [2020-10-28 08:54:23,270 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 08:54:23,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 08:54:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-10-28 08:54:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 08:54:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 283 transitions. [2020-10-28 08:54:23,278 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 283 transitions. Word has length 130 [2020-10-28 08:54:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:23,279 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 283 transitions. [2020-10-28 08:54:23,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:54:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 283 transitions. [2020-10-28 08:54:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 08:54:23,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:23,280 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:23,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:54:23,280 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2110268561, now seen corresponding path program 42 times [2020-10-28 08:54:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721421565] [2020-10-28 08:54:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:28,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 08:54:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:29,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:29,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:29,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:29,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:29,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:29,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721421565] [2020-10-28 08:54:29,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:29,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:54:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591231618] [2020-10-28 08:54:29,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:54:29,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:54:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:29,045 INFO L87 Difference]: Start difference. First operand 224 states and 283 transitions. Second operand 31 states. [2020-10-28 08:54:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:29,362 INFO L93 Difference]: Finished difference Result 255 states and 323 transitions. [2020-10-28 08:54:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:54:29,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 132 [2020-10-28 08:54:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:29,365 INFO L225 Difference]: With dead ends: 255 [2020-10-28 08:54:29,365 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 08:54:29,366 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 08:54:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 08:54:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2020-10-28 08:54:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:54:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 291 transitions. [2020-10-28 08:54:29,373 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 291 transitions. Word has length 132 [2020-10-28 08:54:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:29,373 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 291 transitions. [2020-10-28 08:54:29,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:54:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 291 transitions. [2020-10-28 08:54:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 08:54:29,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:29,375 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:29,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:54:29,375 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -345752731, now seen corresponding path program 43 times [2020-10-28 08:54:29,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:29,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028360980] [2020-10-28 08:54:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 08:54:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:35,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:35,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028360980] [2020-10-28 08:54:35,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:54:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694849002] [2020-10-28 08:54:35,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:54:35,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:35,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:54:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:35,146 INFO L87 Difference]: Start difference. First operand 230 states and 291 transitions. Second operand 32 states. [2020-10-28 08:54:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:35,492 INFO L93 Difference]: Finished difference Result 261 states and 331 transitions. [2020-10-28 08:54:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:54:35,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2020-10-28 08:54:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:35,495 INFO L225 Difference]: With dead ends: 261 [2020-10-28 08:54:35,495 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 08:54:35,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 08:54:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2020-10-28 08:54:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 08:54:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2020-10-28 08:54:35,502 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 135 [2020-10-28 08:54:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2020-10-28 08:54:35,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:54:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2020-10-28 08:54:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 08:54:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:35,510 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:35,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:54:35,510 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1386791953, now seen corresponding path program 44 times [2020-10-28 08:54:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:35,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672731607] [2020-10-28 08:54:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:54:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:41,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-28 08:54:41,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672731607] [2020-10-28 08:54:41,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:41,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:54:41,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195830451] [2020-10-28 08:54:41,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:54:41,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:54:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:41,037 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand 21 states. [2020-10-28 08:54:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:41,226 INFO L93 Difference]: Finished difference Result 434 states and 560 transitions. [2020-10-28 08:54:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:54:41,227 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2020-10-28 08:54:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:41,228 INFO L225 Difference]: With dead ends: 434 [2020-10-28 08:54:41,229 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 08:54:41,229 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 08:54:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 08:54:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-28 08:54:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 08:54:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 301 transitions. [2020-10-28 08:54:41,238 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 301 transitions. Word has length 138 [2020-10-28 08:54:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:41,239 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 301 transitions. [2020-10-28 08:54:41,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:54:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 301 transitions. [2020-10-28 08:54:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 08:54:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:41,240 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:41,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 08:54:41,241 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -564344717, now seen corresponding path program 45 times [2020-10-28 08:54:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:41,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143754773] [2020-10-28 08:54:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 08:54:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:54:47,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143754773] [2020-10-28 08:54:47,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:47,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:54:47,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214861748] [2020-10-28 08:54:47,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:54:47,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:54:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:47,075 INFO L87 Difference]: Start difference. First operand 238 states and 301 transitions. Second operand 33 states. [2020-10-28 08:54:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:47,429 INFO L93 Difference]: Finished difference Result 269 states and 341 transitions. [2020-10-28 08:54:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:54:47,430 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 140 [2020-10-28 08:54:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,432 INFO L225 Difference]: With dead ends: 269 [2020-10-28 08:54:47,432 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 08:54:47,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 08:54:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2020-10-28 08:54:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-28 08:54:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 309 transitions. [2020-10-28 08:54:47,439 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 309 transitions. Word has length 140 [2020-10-28 08:54:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,440 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 309 transitions. [2020-10-28 08:54:47,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:54:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 309 transitions. [2020-10-28 08:54:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 08:54:47,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,442 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:47,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 08:54:47,442 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,442 INFO L82 PathProgramCache]: Analyzing trace with hash 483357763, now seen corresponding path program 46 times [2020-10-28 08:54:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628514982] [2020-10-28 08:54:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:52,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:52,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:54:52,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:52,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 08:54:52,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:53,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:53,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:53,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:53,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:53,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:53,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:54:53,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628514982] [2020-10-28 08:54:53,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:53,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:54:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049054742] [2020-10-28 08:54:53,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:54:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:54:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:54:53,434 INFO L87 Difference]: Start difference. First operand 244 states and 309 transitions. Second operand 34 states. [2020-10-28 08:54:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:53,798 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2020-10-28 08:54:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:54:53,799 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 143 [2020-10-28 08:54:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:53,801 INFO L225 Difference]: With dead ends: 275 [2020-10-28 08:54:53,801 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 08:54:53,802 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 08:54:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 08:54:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2020-10-28 08:54:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 08:54:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2020-10-28 08:54:53,808 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 143 [2020-10-28 08:54:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:53,808 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2020-10-28 08:54:53,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:54:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2020-10-28 08:54:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 08:54:53,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:53,810 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:53,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 08:54:53,810 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1060599411, now seen corresponding path program 47 times [2020-10-28 08:54:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:53,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578455171] [2020-10-28 08:54:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking...