/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/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:06:16,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:06:16,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:06:16,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:06:16,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:06:16,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:06:16,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:06:16,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:06:16,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:06:16,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:06:16,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:06:16,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:06:16,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:06:16,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:06:16,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:06:16,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:06:16,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:06:16,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:06:16,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:06:16,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:06:16,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:06:16,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:06:16,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:06:16,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:06:16,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:06:16,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:06:16,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:06:16,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:06:16,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:06:16,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:06:16,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:06:16,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:06:16,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:06:16,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:06:16,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:06:16,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:06:16,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:06:16,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:06:16,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:06:16,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:06:16,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:06:16,132 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 15:06:16,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:06:16,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:06:16,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:06:16,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:06:16,188 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:06:16,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:06:16,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:06:16,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:06:16,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:06:16,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:06:16,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:06:16,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:06:16,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:06:16,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:06:16,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:06:16,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:06:16,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:06:16,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:06:16,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:06:16,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:06:16,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:06:16,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:06:16,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:06:16,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:06:16,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:06:16,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:06:16,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:06:16,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:06:16,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:06:16,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:06:16,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:06:16,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:06:16,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:06:16,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:06:16,626 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:06:16,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-28 15:06:16,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0cb9e55b/6847b22f672b46ba90801c26df6db684/FLAG6db08f14d [2020-10-28 15:06:17,289 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:06:17,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-28 15:06:17,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0cb9e55b/6847b22f672b46ba90801c26df6db684/FLAG6db08f14d [2020-10-28 15:06:17,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0cb9e55b/6847b22f672b46ba90801c26df6db684 [2020-10-28 15:06:17,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:06:17,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:06:17,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:06:17,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:06:17,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:06:17,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88d1a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17, skipping insertion in model container [2020-10-28 15:06:17,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:06:17,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:06:17,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:06:17,852 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:06:17,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:06:17,886 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:06:17,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17 WrapperNode [2020-10-28 15:06:17,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:06:17,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:06:17,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:06:17,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:06:17,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (1/1) ... [2020-10-28 15:06:17,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:06:17,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:06:17,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:06:17,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:06:17,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (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 15:06:17,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:06:17,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:06:17,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:06:18,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:06:18,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:06:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:06:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:06:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:06:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:06:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:06:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:06:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:06:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:06:18,260 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:06:18,261 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 15:06:18,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:06:18 BoogieIcfgContainer [2020-10-28 15:06:18,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:06:18,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:06:18,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:06:18,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:06:18,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:06:17" (1/3) ... [2020-10-28 15:06:18,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6e4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:06:18, skipping insertion in model container [2020-10-28 15:06:18,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:06:17" (2/3) ... [2020-10-28 15:06:18,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6e4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:06:18, skipping insertion in model container [2020-10-28 15:06:18,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:06:18" (3/3) ... [2020-10-28 15:06:18,272 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2020-10-28 15:06:18,286 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:06:18,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:06:18,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:06:18,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:06:18,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:06:18,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:06:18,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:06:18,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:06:18,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:06:18,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:06:18,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:06:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-28 15:06:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:06:18,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:18,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:18,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1165252201, now seen corresponding path program 1 times [2020-10-28 15:06:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:18,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74701451] [2020-10-28 15:06:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:06:19,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:19,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-28 15:06:19,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:06:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:19,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 15:06:19,276 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 15:06:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:19,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:06:19,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:19,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:19,333 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 15:06:19,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74701451] [2020-10-28 15:06:19,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:19,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:06:19,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968865874] [2020-10-28 15:06:19,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:06:19,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:06:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:06:19,367 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-28 15:06:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:19,444 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-10-28 15:06:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:06:19,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 15:06:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:19,454 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:06:19,454 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:06:19,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:06:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:06:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:06:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:06:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-28 15:06:19,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 16 [2020-10-28 15:06:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:19,500 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-28 15:06:19,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:06:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-28 15:06:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:06:19,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:19,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:19,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:06:19,502 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1279768805, now seen corresponding path program 1 times [2020-10-28 15:06:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:19,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526809397] [2020-10-28 15:06:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:19,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:06:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-28 15:06:19,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:06:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:19,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:20,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:20,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:06:20,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:20,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:20,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:06:20,045 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 15:06:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526809397] [2020-10-28 15:06:20,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:20,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 15:06:20,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233175911] [2020-10-28 15:06:20,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:06:20,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:20,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:06:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:20,065 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 7 states. [2020-10-28 15:06:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:20,472 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-10-28 15:06:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:20,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-28 15:06:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:20,475 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:06:20,475 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:06:20,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:06:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-28 15:06:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:06:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-28 15:06:20,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 16 [2020-10-28 15:06:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:20,487 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-28 15:06:20,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:06:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-28 15:06:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:06:20,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:20,488 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 15:06:20,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:06:20,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 51209556, now seen corresponding path program 1 times [2020-10-28 15:06:20,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:20,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362681199] [2020-10-28 15:06:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:06:20,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:20,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-28 15:06:20,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:06:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:06:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:20,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:20,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:06:20,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:20,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:20,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:20,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:20,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362681199] [2020-10-28 15:06:20,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:20,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:06:20,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467454754] [2020-10-28 15:06:20,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:06:20,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:20,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:06:20,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:06:20,820 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2020-10-28 15:06:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:20,919 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-28 15:06:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:06:20,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 15:06:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:20,921 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:06:20,921 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:06:20,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:06:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:06:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:06:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-10-28 15:06:20,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2020-10-28 15:06:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-10-28 15:06:20,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:06:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-10-28 15:06:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:06:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:20,943 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 15:06:20,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:06:20,944 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash 589216965, now seen corresponding path program 1 times [2020-10-28 15:06:20,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:20,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475418178] [2020-10-28 15:06:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:06:21,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:06:21,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:21,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:21,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:21,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475418178] [2020-10-28 15:06:21,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:21,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:06:21,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797366682] [2020-10-28 15:06:21,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:06:21,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:06:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:06:21,552 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 4 states. [2020-10-28 15:06:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:21,625 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-10-28 15:06:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:06:21,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 15:06:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:21,626 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:06:21,626 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:06:21,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:06:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 15:06:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:06:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-28 15:06:21,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-10-28 15:06:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:21,635 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-28 15:06:21,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:06:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-28 15:06:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:06:21,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:21,636 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 15:06:21,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:06:21,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1054944051, now seen corresponding path program 1 times [2020-10-28 15:06:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:21,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196974261] [2020-10-28 15:06:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:06:22,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:22,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-28 15:06:22,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:06:22,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:22,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:06:22,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:22,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:06:22,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:22,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:22,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:22,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,350 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 15:06:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196974261] [2020-10-28 15:06:22,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:22,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:06:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983314943] [2020-10-28 15:06:22,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:06:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:06:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:22,353 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-10-28 15:06:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:22,491 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-28 15:06:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:06:22,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 15:06:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:22,493 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:06:22,493 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:06:22,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:06:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 15:06:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-10-28 15:06:22,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2020-10-28 15:06:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:22,504 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-10-28 15:06:22,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:06:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-10-28 15:06:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:06:22,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:22,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:22,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:06:22,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash -510729189, now seen corresponding path program 1 times [2020-10-28 15:06:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108768129] [2020-10-28 15:06:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:06:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:06:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:22,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:22,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:06:22,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108768129] [2020-10-28 15:06:22,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:22,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:06:22,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97325802] [2020-10-28 15:06:22,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:06:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:06:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:22,662 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2020-10-28 15:06:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:22,776 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-28 15:06:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:06:22,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 15:06:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:22,778 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:06:22,778 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:06:22,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:06:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:06:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:06:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-28 15:06:22,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2020-10-28 15:06:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:22,785 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-28 15:06:22,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:06:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-28 15:06:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:06:22,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:22,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:22,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:06:22,787 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash -49128531, now seen corresponding path program 1 times [2020-10-28 15:06:22,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:22,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823210834] [2020-10-28 15:06:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:06:22,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:22,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:06:22,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:22,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:22,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:22,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:22,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:22,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:06:22,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823210834] [2020-10-28 15:06:22,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:22,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:06:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747552252] [2020-10-28 15:06:22,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:06:22,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:06:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:06:22,980 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 6 states. [2020-10-28 15:06:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,175 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-28 15:06:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:06:23,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:06:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,176 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:06:23,176 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:06:23,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:06:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-28 15:06:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:06:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-28 15:06:23,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2020-10-28 15:06:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,185 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-28 15:06:23,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:06:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-28 15:06:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:06:23,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:06:23,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash 416598555, now seen corresponding path program 2 times [2020-10-28 15:06:23,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147459725] [2020-10-28 15:06:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:06:24,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-28 15:06:24,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:06:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:06:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:24,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:24,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:24,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147459725] [2020-10-28 15:06:24,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:24,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:06:24,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666361550] [2020-10-28 15:06:24,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:06:24,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:06:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:06:24,100 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 6 states. [2020-10-28 15:06:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:24,301 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-28 15:06:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:06:24,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:06:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:24,303 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:06:24,303 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:06:24,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:06:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-28 15:06:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-10-28 15:06:24,311 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 18 [2020-10-28 15:06:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:24,312 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-10-28 15:06:24,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:06:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-10-28 15:06:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:06:24,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:24,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:24,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:06:24,313 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1713404324, now seen corresponding path program 1 times [2020-10-28 15:06:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:24,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007834122] [2020-10-28 15:06:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:06:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:06:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:24,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:24,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:06:24,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007834122] [2020-10-28 15:06:24,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:24,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:06:24,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798086258] [2020-10-28 15:06:24,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:06:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:06:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:24,498 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 5 states. [2020-10-28 15:06:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:24,684 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-28 15:06:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:06:24,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:06:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:24,685 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:06:24,686 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:06:24,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:06:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-28 15:06:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:06:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-10-28 15:06:24,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2020-10-28 15:06:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:24,695 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-10-28 15:06:24,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:06:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-10-28 15:06:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:06:24,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:24,696 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:24,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:06:24,697 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1636997573, now seen corresponding path program 2 times [2020-10-28 15:06:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:24,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405804617] [2020-10-28 15:06:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:06:24,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:24,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-28 15:06:24,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:06:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:06:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:06:24,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:25,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:25,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:25,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:25,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405804617] [2020-10-28 15:06:25,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:25,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:06:25,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870295927] [2020-10-28 15:06:25,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:06:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:06:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:25,017 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 5 states. [2020-10-28 15:06:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:25,176 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-28 15:06:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:06:25,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:06:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:25,178 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:06:25,178 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:06:25,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:06:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-28 15:06:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-28 15:06:25,187 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 19 [2020-10-28 15:06:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:25,188 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-28 15:06:25,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:06:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-28 15:06:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:06:25,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:25,189 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:25,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:06:25,189 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2102724659, now seen corresponding path program 3 times [2020-10-28 15:06:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:25,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569479008] [2020-10-28 15:06:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:06:25,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:25,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,115 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-28 15:06:26,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:26,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:26,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:26,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569479008] [2020-10-28 15:06:26,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:26,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:26,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699422732] [2020-10-28 15:06:26,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:26,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:26,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:26,254 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 10 states. [2020-10-28 15:06:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:27,214 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-10-28 15:06:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:27,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-28 15:06:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:27,216 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:06:27,216 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:06:27,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:06:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:06:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-28 15:06:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:06:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-10-28 15:06:27,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 19 [2020-10-28 15:06:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:27,228 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-10-28 15:06:27,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-10-28 15:06:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:06:27,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:27,230 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 15:06:27,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:06:27,230 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1649703957, now seen corresponding path program 1 times [2020-10-28 15:06:27,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:27,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090890850] [2020-10-28 15:06:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:28,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:28,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:28,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:28,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:28,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090890850] [2020-10-28 15:06:28,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:28,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:28,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26921059] [2020-10-28 15:06:28,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:28,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:28,694 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 11 states. [2020-10-28 15:06:28,955 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 15:06:29,407 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 15:06:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:29,645 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-10-28 15:06:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:29,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:06:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:29,647 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:06:29,647 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:06:29,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:06:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:06:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 15:06:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:06:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-10-28 15:06:29,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 20 [2020-10-28 15:06:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:29,675 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-10-28 15:06:29,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-10-28 15:06:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:06:29,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:29,679 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:29,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:06:29,679 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 517347981, now seen corresponding path program 2 times [2020-10-28 15:06:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:29,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441126133] [2020-10-28 15:06:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:29,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:30,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:30,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:30,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-28 15:06:30,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:30,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:06:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:06:30,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:30,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:30,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:30,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:30,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:06:30,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441126133] [2020-10-28 15:06:30,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:30,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:06:30,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707603726] [2020-10-28 15:06:30,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:06:30,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:06:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:06:30,420 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 6 states. [2020-10-28 15:06:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:30,641 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2020-10-28 15:06:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:06:30,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 15:06:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:30,643 INFO L225 Difference]: With dead ends: 69 [2020-10-28 15:06:30,643 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:06:30,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:06:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-28 15:06:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:06:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-10-28 15:06:30,659 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 20 [2020-10-28 15:06:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:30,662 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-10-28 15:06:30,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:06:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-10-28 15:06:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:06:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:30,665 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:30,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:06:30,665 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1461940965, now seen corresponding path program 4 times [2020-10-28 15:06:30,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:30,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146064420] [2020-10-28 15:06:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:31,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:31,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-28 15:06:31,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:31,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:31,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:31,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:31,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:31,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:31,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:31,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:31,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146064420] [2020-10-28 15:06:31,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:31,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076685216] [2020-10-28 15:06:31,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:31,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:31,779 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 11 states. [2020-10-28 15:06:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:32,529 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-10-28 15:06:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:32,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:06:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:32,531 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:06:32,531 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:06:32,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:06:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:06:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-28 15:06:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:06:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2020-10-28 15:06:32,544 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 20 [2020-10-28 15:06:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:32,545 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2020-10-28 15:06:32,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2020-10-28 15:06:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:32,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:32,546 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:32,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:06:32,546 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:32,547 INFO L82 PathProgramCache]: Analyzing trace with hash -72744926, now seen corresponding path program 2 times [2020-10-28 15:06:32,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:32,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090000897] [2020-10-28 15:06:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:06:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:06:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090000897] [2020-10-28 15:06:34,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447503480] [2020-10-28 15:06:34,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:34,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:34,204 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand 10 states. [2020-10-28 15:06:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:34,798 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-10-28 15:06:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:34,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-28 15:06:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:34,800 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:06:34,800 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:06:34,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:06:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-28 15:06:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:06:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2020-10-28 15:06:34,821 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 21 [2020-10-28 15:06:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:34,822 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2020-10-28 15:06:34,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2020-10-28 15:06:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:34,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:34,825 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:34,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:06:34,826 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2094307012, now seen corresponding path program 3 times [2020-10-28 15:06:34,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:34,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208385419] [2020-10-28 15:06:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:35,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-28 15:06:35,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:35,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:06:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:06:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:35,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:35,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:06:35,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208385419] [2020-10-28 15:06:35,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:35,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:06:35,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809442293] [2020-10-28 15:06:35,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:06:35,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:06:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:35,700 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand 7 states. [2020-10-28 15:06:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:36,023 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2020-10-28 15:06:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:06:36,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:06:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:36,025 INFO L225 Difference]: With dead ends: 79 [2020-10-28 15:06:36,025 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:06:36,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:06:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-10-28 15:06:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:06:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2020-10-28 15:06:36,044 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 21 [2020-10-28 15:06:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:36,044 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2020-10-28 15:06:36,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:06:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2020-10-28 15:06:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:36,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:36,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:36,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:06:36,046 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash -485188605, now seen corresponding path program 3 times [2020-10-28 15:06:36,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:36,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977650411] [2020-10-28 15:06:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:36,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:36,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:36,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-28 15:06:36,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:36,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:36,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:06:36,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:36,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:06:36,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:37,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:37,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:37,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:37,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:37,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:37,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:06:37,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977650411] [2020-10-28 15:06:37,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:37,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:06:37,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047312686] [2020-10-28 15:06:37,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:06:37,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:06:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:37,054 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand 7 states. [2020-10-28 15:06:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:37,346 INFO L93 Difference]: Finished difference Result 113 states and 164 transitions. [2020-10-28 15:06:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:06:37,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:06:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:37,348 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:06:37,348 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 15:06:37,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 15:06:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2020-10-28 15:06:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:06:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2020-10-28 15:06:37,368 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 21 [2020-10-28 15:06:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:37,368 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2020-10-28 15:06:37,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:06:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2020-10-28 15:06:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:37,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:37,369 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:37,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:06:37,370 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:37,370 INFO L82 PathProgramCache]: Analyzing trace with hash -297425613, now seen corresponding path program 5 times [2020-10-28 15:06:37,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:37,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170887122] [2020-10-28 15:06:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:37,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:38,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:40,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:40,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:40,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:40,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:40,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170887122] [2020-10-28 15:06:40,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:40,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791589089] [2020-10-28 15:06:40,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:40,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2020-10-28 15:06:40,795 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand 12 states. [2020-10-28 15:06:43,703 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 15:06:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:46,272 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2020-10-28 15:06:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:46,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 15:06:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:46,274 INFO L225 Difference]: With dead ends: 105 [2020-10-28 15:06:46,274 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:06:46,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=111, Invalid=487, Unknown=2, NotChecked=0, Total=600 [2020-10-28 15:06:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:06:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2020-10-28 15:06:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:06:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2020-10-28 15:06:46,294 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 21 [2020-10-28 15:06:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:46,297 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2020-10-28 15:06:46,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2020-10-28 15:06:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:46,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:46,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:46,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:06:46,299 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:46,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1185755859, now seen corresponding path program 4 times [2020-10-28 15:06:46,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:46,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433054414] [2020-10-28 15:06:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:06:46,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:46,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:06:46,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:46,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:06:46,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433054414] [2020-10-28 15:06:46,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:46,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:06:46,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988773616] [2020-10-28 15:06:46,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:06:46,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:06:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:46,658 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand 7 states. [2020-10-28 15:06:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:46,907 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2020-10-28 15:06:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:06:46,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 15:06:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:46,909 INFO L225 Difference]: With dead ends: 95 [2020-10-28 15:06:46,909 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:06:46,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:06:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 15:06:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:06:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 97 transitions. [2020-10-28 15:06:46,923 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 97 transitions. Word has length 22 [2020-10-28 15:06:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:46,923 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 97 transitions. [2020-10-28 15:06:46,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:06:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 97 transitions. [2020-10-28 15:06:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:46,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:46,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:46,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:06:46,925 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1588247525, now seen corresponding path program 5 times [2020-10-28 15:06:46,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:46,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288477175] [2020-10-28 15:06:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:47,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:06:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:47,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:06:47,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:47,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:06:47,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288477175] [2020-10-28 15:06:47,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:47,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:47,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773635506] [2020-10-28 15:06:47,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:47,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:47,327 INFO L87 Difference]: Start difference. First operand 70 states and 97 transitions. Second operand 8 states. [2020-10-28 15:06:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:47,675 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2020-10-28 15:06:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:47,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 15:06:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:47,676 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:06:47,677 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:06:47,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:06:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-28 15:06:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:06:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2020-10-28 15:06:47,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 22 [2020-10-28 15:06:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:47,690 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2020-10-28 15:06:47,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2020-10-28 15:06:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:47,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:47,691 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:47,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:06:47,691 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1255048939, now seen corresponding path program 6 times [2020-10-28 15:06:47,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:47,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274326240] [2020-10-28 15:06:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:48,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:48,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:48,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:48,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-28 15:06:48,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:48,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:06:48,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:48,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:48,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:48,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:48,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:48,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:06:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274326240] [2020-10-28 15:06:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081255185] [2020-10-28 15:06:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:48,662 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand 8 states. [2020-10-28 15:06:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:49,060 INFO L93 Difference]: Finished difference Result 120 states and 175 transitions. [2020-10-28 15:06:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:49,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 15:06:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:49,062 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:06:49,062 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:06:49,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:06:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2020-10-28 15:06:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 15:06:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-10-28 15:06:49,079 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 22 [2020-10-28 15:06:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:49,079 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-10-28 15:06:49,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-10-28 15:06:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:49,080 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:49,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:06:49,081 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1442811931, now seen corresponding path program 6 times [2020-10-28 15:06:49,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:49,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641522525] [2020-10-28 15:06:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:49,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:50,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:50,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:50,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:06:50,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:50,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:50,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:50,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641522525] [2020-10-28 15:06:50,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:50,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019777944] [2020-10-28 15:06:50,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:50,559 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 13 states. [2020-10-28 15:06:51,289 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-28 15:06:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:52,205 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2020-10-28 15:06:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:06:52,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 15:06:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:52,210 INFO L225 Difference]: With dead ends: 109 [2020-10-28 15:06:52,210 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:06:52,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:06:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:06:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-28 15:06:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:06:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2020-10-28 15:06:52,230 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 22 [2020-10-28 15:06:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:52,230 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2020-10-28 15:06:52,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2020-10-28 15:06:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:52,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:52,231 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:52,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:06:52,231 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash -632162045, now seen corresponding path program 7 times [2020-10-28 15:06:52,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:52,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110715336] [2020-10-28 15:06:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:52,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:52,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:52,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:53,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:06:53,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:53,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:53,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 15:06:53,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110715336] [2020-10-28 15:06:53,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:53,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435894243] [2020-10-28 15:06:53,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:53,296 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand 8 states. [2020-10-28 15:06:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:53,716 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2020-10-28 15:06:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:06:53,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 15:06:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:53,720 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:06:53,720 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 15:06:53,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 15:06:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-28 15:06:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:06:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2020-10-28 15:06:53,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 23 [2020-10-28 15:06:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:53,735 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2020-10-28 15:06:53,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2020-10-28 15:06:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:53,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:53,736 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:53,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:06:53,736 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1371726797, now seen corresponding path program 1 times [2020-10-28 15:06:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:53,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891679817] [2020-10-28 15:06:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:54,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:06:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:54,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:54,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:54,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:06:54,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891679817] [2020-10-28 15:06:54,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:54,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:06:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858497223] [2020-10-28 15:06:54,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:06:54,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:06:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:06:54,248 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand 5 states. [2020-10-28 15:06:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:54,422 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2020-10-28 15:06:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:06:54,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 15:06:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:54,423 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:06:54,423 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:06:54,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:06:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-10-28 15:06:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:06:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2020-10-28 15:06:54,435 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 23 [2020-10-28 15:06:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:54,436 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2020-10-28 15:06:54,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:06:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2020-10-28 15:06:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:54,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:54,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:54,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:06:54,438 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1925689755, now seen corresponding path program 8 times [2020-10-28 15:06:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:54,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484336418] [2020-10-28 15:06:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:55,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:55,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:55,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:55,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-28 15:06:55,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:55,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:06:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:55,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:55,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:55,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:55,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:55,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:55,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:55,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:55,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:55,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:55,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:55,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:55,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484336418] [2020-10-28 15:06:55,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745248286] [2020-10-28 15:06:55,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:55,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:55,551 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 12 states. [2020-10-28 15:06:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:56,869 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-10-28 15:06:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:06:56,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-28 15:06:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:56,870 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:06:56,870 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:06:56,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:06:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:06:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-10-28 15:06:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:06:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2020-10-28 15:06:56,885 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 24 [2020-10-28 15:06:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:56,885 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2020-10-28 15:06:56,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2020-10-28 15:06:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:56,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:56,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:56,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:06:56,886 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -727220421, now seen corresponding path program 9 times [2020-10-28 15:06:56,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:56,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220432433] [2020-10-28 15:06:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:56,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:57,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:58,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:58,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:58,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:58,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:58,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220432433] [2020-10-28 15:06:58,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:58,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:58,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886623691] [2020-10-28 15:06:58,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:58,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:58,735 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 8 states. [2020-10-28 15:06:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:59,423 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-28 15:06:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:59,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:06:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:59,424 INFO L225 Difference]: With dead ends: 93 [2020-10-28 15:06:59,424 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:06:59,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:06:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-28 15:06:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:06:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-28 15:06:59,439 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 24 [2020-10-28 15:06:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:59,440 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-28 15:06:59,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-28 15:06:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:59,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:59,442 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:59,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:06:59,442 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1228440165, now seen corresponding path program 4 times [2020-10-28 15:06:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:59,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938843564] [2020-10-28 15:06:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:00,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:00,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:01,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:01,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:01,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:01,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938843564] [2020-10-28 15:07:01,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:01,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790209266] [2020-10-28 15:07:01,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:01,114 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 8 states. [2020-10-28 15:07:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:01,555 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-10-28 15:07:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:01,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:07:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:01,557 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:07:01,557 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:07:01,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:07:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-28 15:07:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:07:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-10-28 15:07:01,573 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 24 [2020-10-28 15:07:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:01,573 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-10-28 15:07:01,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-10-28 15:07:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:01,574 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:01,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:07:01,574 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash 202665963, now seen corresponding path program 10 times [2020-10-28 15:07:01,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:01,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140841464] [2020-10-28 15:07:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:07:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:02,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:07:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140841464] [2020-10-28 15:07:02,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:02,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727927311] [2020-10-28 15:07:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:02,014 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 9 states. [2020-10-28 15:07:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:02,567 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2020-10-28 15:07:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:02,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 15:07:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:02,569 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:07:02,569 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 15:07:02,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 15:07:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-28 15:07:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:07:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2020-10-28 15:07:02,588 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 24 [2020-10-28 15:07:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:02,588 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2020-10-28 15:07:02,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2020-10-28 15:07:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:02,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:02,589 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:02,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:07:02,589 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:02,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1849456869, now seen corresponding path program 11 times [2020-10-28 15:07:02,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:02,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831444000] [2020-10-28 15:07:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:03,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:03,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:03,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:03,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:03,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831444000] [2020-10-28 15:07:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679716408] [2020-10-28 15:07:03,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:03,152 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand 9 states. [2020-10-28 15:07:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:03,694 INFO L93 Difference]: Finished difference Result 172 states and 240 transitions. [2020-10-28 15:07:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:07:03,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 15:07:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:03,698 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:07:03,698 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 15:07:03,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:07:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 15:07:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 100. [2020-10-28 15:07:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:07:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-10-28 15:07:03,725 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 24 [2020-10-28 15:07:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-10-28 15:07:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-10-28 15:07:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:03,727 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:03,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:07:03,727 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1642397396, now seen corresponding path program 12 times [2020-10-28 15:07:03,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:03,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084499979] [2020-10-28 15:07:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:03,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:05,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:05,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:05,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:05,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:05,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:05,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084499979] [2020-10-28 15:07:05,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:05,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:05,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308080639] [2020-10-28 15:07:05,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:05,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:05,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:05,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:05,382 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 9 states. [2020-10-28 15:07:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:05,920 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2020-10-28 15:07:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:07:05,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 15:07:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:05,922 INFO L225 Difference]: With dead ends: 133 [2020-10-28 15:07:05,922 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 15:07:05,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:07:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 15:07:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-10-28 15:07:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:07:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2020-10-28 15:07:05,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 25 [2020-10-28 15:07:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:05,945 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2020-10-28 15:07:05,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2020-10-28 15:07:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:05,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:05,946 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:05,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:07:05,946 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:05,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1311953715, now seen corresponding path program 13 times [2020-10-28 15:07:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:05,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459023544] [2020-10-28 15:07:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:05,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-28 15:07:06,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:07:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:07:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:06,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:06,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:07:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459023544] [2020-10-28 15:07:06,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:06,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:06,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401786909] [2020-10-28 15:07:06,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:06,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:06,663 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand 7 states. [2020-10-28 15:07:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:07,006 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2020-10-28 15:07:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:07,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 15:07:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:07,008 INFO L225 Difference]: With dead ends: 131 [2020-10-28 15:07:07,008 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:07:07,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:07:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-28 15:07:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 15:07:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2020-10-28 15:07:07,031 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 25 [2020-10-28 15:07:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:07,032 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2020-10-28 15:07:07,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2020-10-28 15:07:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:07,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:07,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:07,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:07:07,033 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1079885403, now seen corresponding path program 14 times [2020-10-28 15:07:07,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:07,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236605241] [2020-10-28 15:07:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:07,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:07,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:07,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:07,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:07:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:07,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:07:07,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236605241] [2020-10-28 15:07:07,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:07,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:07,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337070278] [2020-10-28 15:07:07,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:07,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:07,541 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand 9 states. [2020-10-28 15:07:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:08,234 INFO L93 Difference]: Finished difference Result 152 states and 193 transitions. [2020-10-28 15:07:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:08,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 15:07:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:08,236 INFO L225 Difference]: With dead ends: 152 [2020-10-28 15:07:08,236 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:07:08,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:07:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-10-28 15:07:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:07:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-10-28 15:07:08,253 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 26 [2020-10-28 15:07:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:08,254 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-10-28 15:07:08,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-10-28 15:07:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:08,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:08,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:08,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:07:08,255 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1484701933, now seen corresponding path program 15 times [2020-10-28 15:07:08,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:08,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972267694] [2020-10-28 15:07:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:08,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:08,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:08,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:08,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:08,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:07:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972267694] [2020-10-28 15:07:08,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:08,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:07:08,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618581866] [2020-10-28 15:07:08,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:07:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:08,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:07:08,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:08,829 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 10 states. [2020-10-28 15:07:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:09,377 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2020-10-28 15:07:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:09,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 15:07:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:09,379 INFO L225 Difference]: With dead ends: 139 [2020-10-28 15:07:09,380 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 15:07:09,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 15:07:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2020-10-28 15:07:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:07:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-28 15:07:09,401 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 26 [2020-10-28 15:07:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:09,401 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-28 15:07:09,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:07:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-28 15:07:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:09,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:09,402 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:09,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:07:09,402 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1585306291, now seen corresponding path program 16 times [2020-10-28 15:07:09,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:09,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043730813] [2020-10-28 15:07:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:09,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:07:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:12,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:12,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:12,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043730813] [2020-10-28 15:07:12,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:12,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:07:12,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813778542] [2020-10-28 15:07:12,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:07:12,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:07:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:07:12,165 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 15 states. [2020-10-28 15:07:12,663 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-28 15:07:13,024 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-28 15:07:15,391 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-28 15:07:15,828 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 65 [2020-10-28 15:07:18,588 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 118 DAG size of output: 67 [2020-10-28 15:07:19,334 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 65 [2020-10-28 15:07:22,160 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 129 DAG size of output: 66 [2020-10-28 15:07:22,466 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 15:07:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:22,897 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2020-10-28 15:07:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:07:22,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-28 15:07:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:22,899 INFO L225 Difference]: With dead ends: 107 [2020-10-28 15:07:22,899 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 15:07:22,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:07:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 15:07:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-28 15:07:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 15:07:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-28 15:07:22,916 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 27 [2020-10-28 15:07:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:22,917 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-28 15:07:22,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:07:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-28 15:07:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:22,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:22,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:22,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:07:22,918 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash 686660075, now seen corresponding path program 17 times [2020-10-28 15:07:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:22,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613677978] [2020-10-28 15:07:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:07:23,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:23,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:07:23,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:26,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:26,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:26,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613677978] [2020-10-28 15:07:26,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:26,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:07:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493508766] [2020-10-28 15:07:26,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:07:26,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:07:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=156, Unknown=1, NotChecked=0, Total=182 [2020-10-28 15:07:26,696 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 14 states. [2020-10-28 15:07:27,331 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-10-28 15:07:27,527 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 15:07:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:28,225 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2020-10-28 15:07:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:07:28,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-28 15:07:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:28,227 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:07:28,227 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 15:07:28,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=78, Invalid=521, Unknown=1, NotChecked=0, Total=600 [2020-10-28 15:07:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 15:07:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2020-10-28 15:07:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 15:07:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-10-28 15:07:28,245 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 28 [2020-10-28 15:07:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:28,245 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-10-28 15:07:28,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:07:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-10-28 15:07:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:28,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:28,246 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:28,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:07:28,247 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1942661717, now seen corresponding path program 18 times [2020-10-28 15:07:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:28,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604244250] [2020-10-28 15:07:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:31,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:31,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2960 [2020-10-28 15:07:31,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:07:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:07:31,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:31,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:31,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:31,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:07:31,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604244250] [2020-10-28 15:07:31,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:31,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:07:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437528659] [2020-10-28 15:07:31,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:07:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:07:31,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:31,456 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 10 states. [2020-10-28 15:07:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:32,208 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-10-28 15:07:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:32,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 15:07:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:32,211 INFO L225 Difference]: With dead ends: 140 [2020-10-28 15:07:32,211 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 15:07:32,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 15:07:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-28 15:07:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 15:07:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2020-10-28 15:07:32,231 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 28 [2020-10-28 15:07:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:32,231 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2020-10-28 15:07:32,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:07:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2020-10-28 15:07:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:32,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:32,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:32,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:07:32,233 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1275624997, now seen corresponding path program 19 times [2020-10-28 15:07:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:32,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98614225] [2020-10-28 15:07:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:07:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:32,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:32,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:32,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:32,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:32,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:32,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 15:07:32,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98614225] [2020-10-28 15:07:32,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:32,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:07:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283440231] [2020-10-28 15:07:32,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:07:32,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:07:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:32,851 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand 11 states. [2020-10-28 15:07:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:33,642 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2020-10-28 15:07:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:07:33,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 15:07:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:33,645 INFO L225 Difference]: With dead ends: 154 [2020-10-28 15:07:33,645 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 15:07:33,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:07:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 15:07:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-10-28 15:07:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:07:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2020-10-28 15:07:33,668 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 28 [2020-10-28 15:07:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:33,668 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2020-10-28 15:07:33,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:07:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2020-10-28 15:07:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:33,668 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:33,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:07:33,669 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash 303268845, now seen corresponding path program 20 times [2020-10-28 15:07:33,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:33,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829345342] [2020-10-28 15:07:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:33,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:07:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:34,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:34,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:34,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:34,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829345342] [2020-10-28 15:07:34,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:34,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:07:34,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454960005] [2020-10-28 15:07:34,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:07:34,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:07:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:34,633 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand 10 states. [2020-10-28 15:07:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:35,264 INFO L93 Difference]: Finished difference Result 230 states and 302 transitions. [2020-10-28 15:07:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:35,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 15:07:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:35,266 INFO L225 Difference]: With dead ends: 230 [2020-10-28 15:07:35,266 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 15:07:35,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 15:07:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 135. [2020-10-28 15:07:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 15:07:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2020-10-28 15:07:35,297 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 28 [2020-10-28 15:07:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:35,297 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2020-10-28 15:07:35,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:07:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2020-10-28 15:07:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:35,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:35,298 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:35,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:07:35,298 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1790155102, now seen corresponding path program 21 times [2020-10-28 15:07:35,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:35,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744508568] [2020-10-28 15:07:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3591 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:39,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:39,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:39,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:07:39,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744508568] [2020-10-28 15:07:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:07:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32923992] [2020-10-28 15:07:39,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:07:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:07:39,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:39,114 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand 11 states. [2020-10-28 15:07:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:39,893 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2020-10-28 15:07:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:07:39,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:07:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:39,895 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:07:39,895 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 15:07:39,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 15:07:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2020-10-28 15:07:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 15:07:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2020-10-28 15:07:39,919 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 29 [2020-10-28 15:07:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:39,920 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2020-10-28 15:07:39,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:07:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2020-10-28 15:07:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:39,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:39,920 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:39,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:07:39,920 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash 793707525, now seen corresponding path program 22 times [2020-10-28 15:07:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:39,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457315375] [2020-10-28 15:07:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:39,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:41,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:07:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:41,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457315375] [2020-10-28 15:07:41,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:41,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:07:41,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106442987] [2020-10-28 15:07:41,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:07:41,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:07:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:41,199 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand 11 states. [2020-10-28 15:07:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:42,028 INFO L93 Difference]: Finished difference Result 293 states and 391 transitions. [2020-10-28 15:07:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:07:42,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:07:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:42,031 INFO L225 Difference]: With dead ends: 293 [2020-10-28 15:07:42,031 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 15:07:42,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 15:07:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 168. [2020-10-28 15:07:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 15:07:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 215 transitions. [2020-10-28 15:07:42,074 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 215 transitions. Word has length 29 [2020-10-28 15:07:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:42,075 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 215 transitions. [2020-10-28 15:07:42,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:07:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 215 transitions. [2020-10-28 15:07:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:07:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:42,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:42,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:07:42,076 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1313700461, now seen corresponding path program 23 times [2020-10-28 15:07:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912158557] [2020-10-28 15:07:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:42,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:42,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:07:42,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912158557] [2020-10-28 15:07:42,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:42,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:07:42,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973875462] [2020-10-28 15:07:42,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:07:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:07:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:42,997 INFO L87 Difference]: Start difference. First operand 168 states and 215 transitions. Second operand 11 states. [2020-10-28 15:07:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:43,548 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2020-10-28 15:07:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:07:43,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 15:07:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:43,550 INFO L225 Difference]: With dead ends: 195 [2020-10-28 15:07:43,550 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 15:07:43,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 15:07:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-28 15:07:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 15:07:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2020-10-28 15:07:43,574 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 30 [2020-10-28 15:07:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:43,574 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2020-10-28 15:07:43,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:07:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2020-10-28 15:07:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:07:43,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:43,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:43,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:07:43,575 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2134534565, now seen corresponding path program 24 times [2020-10-28 15:07:43,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:43,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368633343] [2020-10-28 15:07:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:44,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:07:44,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:44,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:44,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:44,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:44,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:44,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:44,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:07:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368633343] [2020-10-28 15:07:44,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:07:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798911498] [2020-10-28 15:07:44,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:07:44,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:07:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:44,486 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 12 states. [2020-10-28 15:07:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:45,244 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2020-10-28 15:07:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:45,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 15:07:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:45,247 INFO L225 Difference]: With dead ends: 212 [2020-10-28 15:07:45,247 INFO L226 Difference]: Without dead ends: 197 [2020-10-28 15:07:45,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:07:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-28 15:07:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2020-10-28 15:07:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 15:07:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2020-10-28 15:07:45,276 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 30 [2020-10-28 15:07:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:45,276 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2020-10-28 15:07:45,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:07:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2020-10-28 15:07:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:07:45,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:45,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:45,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:07:45,277 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash -167557971, now seen corresponding path program 25 times [2020-10-28 15:07:45,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:45,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286212613] [2020-10-28 15:07:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:45,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:45,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:45,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:45,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:45,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 15:07:45,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286212613] [2020-10-28 15:07:45,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:45,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:07:45,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691667872] [2020-10-28 15:07:45,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:07:45,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:07:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:45,916 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand 12 states. [2020-10-28 15:07:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:46,861 INFO L93 Difference]: Finished difference Result 231 states and 273 transitions. [2020-10-28 15:07:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:07:46,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 15:07:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:46,864 INFO L225 Difference]: With dead ends: 231 [2020-10-28 15:07:46,864 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 15:07:46,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:07:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 15:07:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 146. [2020-10-28 15:07:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 15:07:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2020-10-28 15:07:46,898 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 30 [2020-10-28 15:07:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:46,899 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2020-10-28 15:07:46,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:07:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2020-10-28 15:07:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:07:46,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:46,900 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:46,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:07:46,900 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1182562579, now seen corresponding path program 26 times [2020-10-28 15:07:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:46,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343441836] [2020-10-28 15:07:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:48,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:48,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:48,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:07:48,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343441836] [2020-10-28 15:07:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389730995] [2020-10-28 15:07:48,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:48,253 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand 9 states. [2020-10-28 15:07:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:48,829 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2020-10-28 15:07:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:07:48,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-28 15:07:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:48,832 INFO L225 Difference]: With dead ends: 170 [2020-10-28 15:07:48,832 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 15:07:48,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 15:07:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2020-10-28 15:07:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 15:07:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2020-10-28 15:07:48,864 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 30 [2020-10-28 15:07:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:48,865 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2020-10-28 15:07:48,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2020-10-28 15:07:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:07:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:48,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:48,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:07:48,866 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash 168049691, now seen corresponding path program 27 times [2020-10-28 15:07:48,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:48,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530203100] [2020-10-28 15:07:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:48,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:07:50,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:50,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:07:50,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530203100] [2020-10-28 15:07:50,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:50,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:07:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259658728] [2020-10-28 15:07:50,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:07:50,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:07:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:50,902 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand 16 states. [2020-10-28 15:07:51,466 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-28 15:07:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:52,345 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2020-10-28 15:07:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:07:52,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-28 15:07:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:52,347 INFO L225 Difference]: With dead ends: 191 [2020-10-28 15:07:52,347 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 15:07:52,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:07:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 15:07:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 150. [2020-10-28 15:07:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 15:07:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 186 transitions. [2020-10-28 15:07:52,373 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 186 transitions. Word has length 32 [2020-10-28 15:07:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:52,373 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 186 transitions. [2020-10-28 15:07:52,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:07:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 186 transitions. [2020-10-28 15:07:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:07:52,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:52,374 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:52,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:07:52,374 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 617407867, now seen corresponding path program 28 times [2020-10-28 15:07:52,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:52,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940023162] [2020-10-28 15:07:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:52,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:57,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:57,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:07:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940023162] [2020-10-28 15:07:57,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:57,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:07:57,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027884918] [2020-10-28 15:07:57,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:07:57,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:07:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:57,655 INFO L87 Difference]: Start difference. First operand 150 states and 186 transitions. Second operand 12 states. [2020-10-28 15:07:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:58,576 INFO L93 Difference]: Finished difference Result 191 states and 244 transitions. [2020-10-28 15:07:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:58,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 15:07:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:58,578 INFO L225 Difference]: With dead ends: 191 [2020-10-28 15:07:58,578 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 15:07:58,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:07:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 15:07:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2020-10-28 15:07:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 15:07:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2020-10-28 15:07:58,605 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 32 [2020-10-28 15:07:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:58,605 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2020-10-28 15:07:58,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:07:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2020-10-28 15:07:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:07:58,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:58,605 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:58,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:07:58,606 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1758989803, now seen corresponding path program 29 times [2020-10-28 15:07:58,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:58,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132711767] [2020-10-28 15:07:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:58,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:59,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:07:59,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132711767] [2020-10-28 15:07:59,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:59,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:07:59,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186651230] [2020-10-28 15:07:59,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:07:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:59,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:07:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:59,802 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand 13 states. [2020-10-28 15:08:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:00,912 INFO L93 Difference]: Finished difference Result 255 states and 301 transitions. [2020-10-28 15:08:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:08:00,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-28 15:08:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:00,914 INFO L225 Difference]: With dead ends: 255 [2020-10-28 15:08:00,914 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 15:08:00,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:08:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 15:08:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 166. [2020-10-28 15:08:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 15:08:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2020-10-28 15:08:00,951 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 32 [2020-10-28 15:08:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:00,951 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2020-10-28 15:08:00,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2020-10-28 15:08:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:08:00,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:00,952 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:00,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:08:00,952 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1540939755, now seen corresponding path program 30 times [2020-10-28 15:08:00,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:00,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670010189] [2020-10-28 15:08:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:08:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:03,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:03,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:03,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:08:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670010189] [2020-10-28 15:08:03,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:03,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:08:03,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87341133] [2020-10-28 15:08:03,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:08:03,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:08:03,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:08:03,798 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand 12 states. [2020-10-28 15:08:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:04,638 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2020-10-28 15:08:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:04,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 15:08:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:04,640 INFO L225 Difference]: With dead ends: 243 [2020-10-28 15:08:04,640 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 15:08:04,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 15:08:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2020-10-28 15:08:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 15:08:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2020-10-28 15:08:04,678 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 32 [2020-10-28 15:08:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:04,678 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2020-10-28 15:08:04,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:08:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2020-10-28 15:08:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:08:04,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:04,679 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:04,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:08:04,679 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:04,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1035626580, now seen corresponding path program 31 times [2020-10-28 15:08:04,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:04,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375650333] [2020-10-28 15:08:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:08:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:09,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:09,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:09,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:09,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:09,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:08:09,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375650333] [2020-10-28 15:08:09,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:09,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:09,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229815701] [2020-10-28 15:08:09,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:09,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:09,976 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand 13 states. [2020-10-28 15:08:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:11,091 INFO L93 Difference]: Finished difference Result 217 states and 281 transitions. [2020-10-28 15:08:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:11,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-28 15:08:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:11,094 INFO L225 Difference]: With dead ends: 217 [2020-10-28 15:08:11,094 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 15:08:11,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 15:08:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 186. [2020-10-28 15:08:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 15:08:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2020-10-28 15:08:11,137 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 33 [2020-10-28 15:08:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:11,137 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2020-10-28 15:08:11,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2020-10-28 15:08:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:08:11,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:11,138 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:11,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:08:11,139 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 554601843, now seen corresponding path program 32 times [2020-10-28 15:08:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:11,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7166354] [2020-10-28 15:08:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:11,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:11,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2324 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:08:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:13,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:13,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7166354] [2020-10-28 15:08:13,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:08:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432494864] [2020-10-28 15:08:13,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:08:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:08:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:08:13,691 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand 12 states. [2020-10-28 15:08:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:14,679 INFO L93 Difference]: Finished difference Result 375 states and 502 transitions. [2020-10-28 15:08:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:08:14,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 15:08:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:14,682 INFO L225 Difference]: With dead ends: 375 [2020-10-28 15:08:14,682 INFO L226 Difference]: Without dead ends: 346 [2020-10-28 15:08:14,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-28 15:08:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 207. [2020-10-28 15:08:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 15:08:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 263 transitions. [2020-10-28 15:08:14,741 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 263 transitions. Word has length 33 [2020-10-28 15:08:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:14,741 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 263 transitions. [2020-10-28 15:08:14,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:08:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 263 transitions. [2020-10-28 15:08:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:08:14,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:14,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:14,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:08:14,742 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2063788187, now seen corresponding path program 33 times [2020-10-28 15:08:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:14,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379351727] [2020-10-28 15:08:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:14,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:16,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:08:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:16,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:16,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:16,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:16,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:16,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:08:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379351727] [2020-10-28 15:08:16,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:16,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:16,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937856578] [2020-10-28 15:08:16,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:16,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:16,691 INFO L87 Difference]: Start difference. First operand 207 states and 263 transitions. Second operand 13 states. [2020-10-28 15:08:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:17,445 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2020-10-28 15:08:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:17,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 15:08:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:17,449 INFO L225 Difference]: With dead ends: 247 [2020-10-28 15:08:17,449 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 15:08:17,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 15:08:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-10-28 15:08:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 15:08:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 231 transitions. [2020-10-28 15:08:17,499 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 231 transitions. Word has length 34 [2020-10-28 15:08:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:17,500 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 231 transitions. [2020-10-28 15:08:17,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 231 transitions. [2020-10-28 15:08:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:08:17,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:17,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:17,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:08:17,503 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2062489133, now seen corresponding path program 34 times [2020-10-28 15:08:17,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:17,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828519988] [2020-10-28 15:08:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:17,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:08:18,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:18,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:18,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:08:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828519988] [2020-10-28 15:08:18,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:18,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:08:18,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545653182] [2020-10-28 15:08:18,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:08:18,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:08:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:18,915 INFO L87 Difference]: Start difference. First operand 183 states and 231 transitions. Second operand 14 states. [2020-10-28 15:08:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:19,939 INFO L93 Difference]: Finished difference Result 273 states and 326 transitions. [2020-10-28 15:08:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:08:19,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-28 15:08:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:19,942 INFO L225 Difference]: With dead ends: 273 [2020-10-28 15:08:19,942 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 15:08:19,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:08:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 15:08:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 183. [2020-10-28 15:08:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 15:08:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-28 15:08:19,976 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 34 [2020-10-28 15:08:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-28 15:08:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:08:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-28 15:08:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:08:19,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:19,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:19,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:08:19,978 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:19,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:19,978 INFO L82 PathProgramCache]: Analyzing trace with hash 954068571, now seen corresponding path program 35 times [2020-10-28 15:08:19,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:19,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673703549] [2020-10-28 15:08:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:21,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:21,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:08:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673703549] [2020-10-28 15:08:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:21,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:08:21,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818984745] [2020-10-28 15:08:21,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:08:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:08:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:21,663 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 14 states. [2020-10-28 15:08:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:22,914 INFO L93 Difference]: Finished difference Result 296 states and 349 transitions. [2020-10-28 15:08:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:08:22,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-28 15:08:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:22,916 INFO L225 Difference]: With dead ends: 296 [2020-10-28 15:08:22,916 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 15:08:22,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:08:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 15:08:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2020-10-28 15:08:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 15:08:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 229 transitions. [2020-10-28 15:08:22,946 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 229 transitions. Word has length 34 [2020-10-28 15:08:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:22,947 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 229 transitions. [2020-10-28 15:08:22,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:08:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 229 transitions. [2020-10-28 15:08:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:08:22,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:22,947 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:22,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:08:22,948 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1510515621, now seen corresponding path program 36 times [2020-10-28 15:08:22,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:22,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605230583] [2020-10-28 15:08:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:22,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2400 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:25,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:25,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:25,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:25,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:25,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:25,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605230583] [2020-10-28 15:08:25,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:25,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:25,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572044953] [2020-10-28 15:08:25,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:25,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:25,600 INFO L87 Difference]: Start difference. First operand 183 states and 229 transitions. Second operand 13 states. [2020-10-28 15:08:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:26,710 INFO L93 Difference]: Finished difference Result 378 states and 510 transitions. [2020-10-28 15:08:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:26,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 15:08:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:26,713 INFO L225 Difference]: With dead ends: 378 [2020-10-28 15:08:26,713 INFO L226 Difference]: Without dead ends: 349 [2020-10-28 15:08:26,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-28 15:08:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 204. [2020-10-28 15:08:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 15:08:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 259 transitions. [2020-10-28 15:08:26,756 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 259 transitions. Word has length 34 [2020-10-28 15:08:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:26,757 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 259 transitions. [2020-10-28 15:08:26,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 259 transitions. [2020-10-28 15:08:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:26,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:26,757 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:26,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:08:26,757 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1104647565, now seen corresponding path program 37 times [2020-10-28 15:08:26,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:26,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023811498] [2020-10-28 15:08:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:27,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3645 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:08:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:30,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:30,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:30,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:30,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 15:08:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023811498] [2020-10-28 15:08:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:30,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:08:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560921308] [2020-10-28 15:08:30,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:08:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:08:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:30,687 INFO L87 Difference]: Start difference. First operand 204 states and 259 transitions. Second operand 11 states. [2020-10-28 15:08:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:31,572 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2020-10-28 15:08:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:31,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 15:08:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:31,574 INFO L225 Difference]: With dead ends: 243 [2020-10-28 15:08:31,574 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 15:08:31,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 15:08:31,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2020-10-28 15:08:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 15:08:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 241 transitions. [2020-10-28 15:08:31,629 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 241 transitions. Word has length 35 [2020-10-28 15:08:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:31,629 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 241 transitions. [2020-10-28 15:08:31,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:08:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 241 transitions. [2020-10-28 15:08:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:31,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:31,630 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:31,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:08:31,630 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1945612309, now seen corresponding path program 38 times [2020-10-28 15:08:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:31,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086447707] [2020-10-28 15:08:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:08:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:36,244 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-10-28 15:08:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:37,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:37,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:08:37,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086447707] [2020-10-28 15:08:37,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:37,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:08:37,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991141937] [2020-10-28 15:08:37,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:08:37,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:08:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:37,361 INFO L87 Difference]: Start difference. First operand 190 states and 241 transitions. Second operand 18 states. [2020-10-28 15:08:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:39,531 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2020-10-28 15:08:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:08:39,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-28 15:08:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:39,533 INFO L225 Difference]: With dead ends: 268 [2020-10-28 15:08:39,533 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 15:08:39,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:08:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 15:08:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 205. [2020-10-28 15:08:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-28 15:08:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 257 transitions. [2020-10-28 15:08:39,586 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 257 transitions. Word has length 36 [2020-10-28 15:08:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:39,586 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 257 transitions. [2020-10-28 15:08:39,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:08:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 257 transitions. [2020-10-28 15:08:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:39,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:39,587 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:39,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:08:39,588 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash 485615467, now seen corresponding path program 39 times [2020-10-28 15:08:39,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:39,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941534589] [2020-10-28 15:08:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:39,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:39,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:44,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:44,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:44,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:08:44,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941534589] [2020-10-28 15:08:44,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:44,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:08:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682552016] [2020-10-28 15:08:44,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:08:44,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:08:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:44,942 INFO L87 Difference]: Start difference. First operand 205 states and 257 transitions. Second operand 14 states. [2020-10-28 15:08:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:46,252 INFO L93 Difference]: Finished difference Result 258 states and 335 transitions. [2020-10-28 15:08:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:08:46,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 15:08:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:46,255 INFO L225 Difference]: With dead ends: 258 [2020-10-28 15:08:46,255 INFO L226 Difference]: Without dead ends: 251 [2020-10-28 15:08:46,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:08:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-28 15:08:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2020-10-28 15:08:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 15:08:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2020-10-28 15:08:46,304 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 36 [2020-10-28 15:08:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:46,304 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2020-10-28 15:08:46,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:08:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2020-10-28 15:08:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:46,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:46,305 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:46,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:08:46,305 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1872272293, now seen corresponding path program 40 times [2020-10-28 15:08:46,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:46,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179878013] [2020-10-28 15:08:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:48,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:48,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:08:48,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:48,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:48,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:48,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:48,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:08:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179878013] [2020-10-28 15:08:48,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:48,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:08:48,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438690147] [2020-10-28 15:08:48,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:08:48,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:08:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:48,537 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand 15 states. [2020-10-28 15:08:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:50,032 INFO L93 Difference]: Finished difference Result 344 states and 411 transitions. [2020-10-28 15:08:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:08:50,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-28 15:08:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:50,036 INFO L225 Difference]: With dead ends: 344 [2020-10-28 15:08:50,036 INFO L226 Difference]: Without dead ends: 326 [2020-10-28 15:08:50,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:08:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-28 15:08:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 224. [2020-10-28 15:08:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 15:08:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 281 transitions. [2020-10-28 15:08:50,089 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 281 transitions. Word has length 36 [2020-10-28 15:08:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:50,089 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 281 transitions. [2020-10-28 15:08:50,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:08:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 281 transitions. [2020-10-28 15:08:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:50,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:50,090 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:50,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 15:08:50,090 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2040595309, now seen corresponding path program 41 times [2020-10-28 15:08:50,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:50,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476234338] [2020-10-28 15:08:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:50,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:53,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:53,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:53,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:53,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2919 [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:53,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:53,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:53,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:53,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:53,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:53,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:53,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:53,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:53,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:53,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:53,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:53,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:53,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:08:53,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476234338] [2020-10-28 15:08:53,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:53,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:08:53,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470536284] [2020-10-28 15:08:53,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:08:53,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:08:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:53,357 INFO L87 Difference]: Start difference. First operand 224 states and 281 transitions. Second operand 14 states. [2020-10-28 15:08:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:54,757 INFO L93 Difference]: Finished difference Result 442 states and 598 transitions. [2020-10-28 15:08:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:08:54,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 15:08:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:54,761 INFO L225 Difference]: With dead ends: 442 [2020-10-28 15:08:54,761 INFO L226 Difference]: Without dead ends: 412 [2020-10-28 15:08:54,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:08:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-28 15:08:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 246. [2020-10-28 15:08:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 15:08:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 312 transitions. [2020-10-28 15:08:54,826 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 312 transitions. Word has length 36 [2020-10-28 15:08:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:54,827 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 312 transitions. [2020-10-28 15:08:54,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:08:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 312 transitions. [2020-10-28 15:08:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:08:54,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:54,828 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:54,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 15:08:54,828 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -560661214, now seen corresponding path program 42 times [2020-10-28 15:08:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:54,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030315639] [2020-10-28 15:08:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:00,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:00,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030315639] [2020-10-28 15:09:00,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:00,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:09:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412939186] [2020-10-28 15:09:00,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:09:00,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:09:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:00,250 INFO L87 Difference]: Start difference. First operand 246 states and 312 transitions. Second operand 15 states. [2020-10-28 15:09:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:01,996 INFO L93 Difference]: Finished difference Result 302 states and 395 transitions. [2020-10-28 15:09:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:09:01,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-28 15:09:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:01,999 INFO L225 Difference]: With dead ends: 302 [2020-10-28 15:09:01,999 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 15:09:02,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:09:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 15:09:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 267. [2020-10-28 15:09:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-28 15:09:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 340 transitions. [2020-10-28 15:09:02,062 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 340 transitions. Word has length 37 [2020-10-28 15:09:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:02,062 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 340 transitions. [2020-10-28 15:09:02,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:09:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 340 transitions. [2020-10-28 15:09:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:09:02,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:02,063 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:02,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 15:09:02,063 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1237773189, now seen corresponding path program 43 times [2020-10-28 15:09:02,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:02,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793075067] [2020-10-28 15:09:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3230 [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:05,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:09:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:09:05,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:05,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:05,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:05,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:05,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 15:09:05,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793075067] [2020-10-28 15:09:05,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:05,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:05,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439221357] [2020-10-28 15:09:05,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:05,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:05,507 INFO L87 Difference]: Start difference. First operand 267 states and 340 transitions. Second operand 11 states. [2020-10-28 15:09:06,227 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:09:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:06,643 INFO L93 Difference]: Finished difference Result 445 states and 531 transitions. [2020-10-28 15:09:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:09:06,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 15:09:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:06,645 INFO L225 Difference]: With dead ends: 445 [2020-10-28 15:09:06,645 INFO L226 Difference]: Without dead ends: 422 [2020-10-28 15:09:06,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-28 15:09:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 273. [2020-10-28 15:09:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-28 15:09:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-10-28 15:09:06,706 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 37 [2020-10-28 15:09:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:06,706 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-10-28 15:09:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-10-28 15:09:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:06,707 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:06,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 15:09:06,708 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1484908627, now seen corresponding path program 44 times [2020-10-28 15:09:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048559390] [2020-10-28 15:09:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:06,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2882 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:09:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:09:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:09:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:13,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:09:13,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048559390] [2020-10-28 15:09:13,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:13,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:09:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345529103] [2020-10-28 15:09:13,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:09:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:09:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=181, Unknown=1, NotChecked=0, Total=210 [2020-10-28 15:09:13,111 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 15 states. [2020-10-28 15:09:40,971 WARN L193 SmtUtils]: Spent 24.29 s on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 15:09:52,400 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 54