/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:47:36,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:47:36,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:47:36,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:47:36,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:47:36,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:47:36,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:47:36,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:47:36,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:47:36,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:47:36,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:47:36,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:47:36,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:47:36,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:47:36,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:47:36,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:47:36,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:47:36,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:47:36,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:47:36,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:47:36,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:47:36,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:47:36,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:47:36,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:47:36,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:47:36,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:47:36,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:47:36,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:47:36,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:47:36,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:47:36,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:47:36,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:47:36,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:47:36,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:47:36,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:47:36,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:47:36,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:47:36,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:47:36,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:47:36,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:47:36,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:47:36,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:47:36,691 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:47:36,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:47:36,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:47:36,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:47:36,695 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:47:36,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:47:36,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:47:36,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:47:36,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:47:36,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:47:36,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:47:36,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:47:36,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:47:36,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:47:36,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:47:36,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:47:36,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:36,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:47:36,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:47:36,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:47:36,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:47:36,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:47:36,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:47:36,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:47:36,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:47:37,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:47:37,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:47:37,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:47:37,137 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:47:37,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:47:37,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-28 08:47:37,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e4a12ee7/5098889a66d8424fafe474e67981b675/FLAGa245a5ef3 [2020-10-28 08:47:37,873 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:47:37,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-28 08:47:37,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e4a12ee7/5098889a66d8424fafe474e67981b675/FLAGa245a5ef3 [2020-10-28 08:47:38,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e4a12ee7/5098889a66d8424fafe474e67981b675 [2020-10-28 08:47:38,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:47:38,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:47:38,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:38,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:47:38,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:47:38,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9ae521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38, skipping insertion in model container [2020-10-28 08:47:38,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:47:38,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:47:38,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:38,452 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:47:38,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:38,492 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:47:38,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38 WrapperNode [2020-10-28 08:47:38,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:38,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:47:38,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:47:38,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:47:38,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... [2020-10-28 08:47:38,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:47:38,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:47:38,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:47:38,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:47:38,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:38,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:47:38,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:47:38,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:47:38,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:47:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:47:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:47:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:47:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:47:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:47:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:47:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:47:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:47:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:47:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:47:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:47:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:47:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:47:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:47:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:47:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:47:39,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:47:39,199 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 08:47:39,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:39 BoogieIcfgContainer [2020-10-28 08:47:39,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:47:39,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:47:39,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:47:39,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:47:39,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:38" (1/3) ... [2020-10-28 08:47:39,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5174ee1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:39, skipping insertion in model container [2020-10-28 08:47:39,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:38" (2/3) ... [2020-10-28 08:47:39,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5174ee1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:39, skipping insertion in model container [2020-10-28 08:47:39,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:39" (3/3) ... [2020-10-28 08:47:39,216 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-10-28 08:47:39,230 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:47:39,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:47:39,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:47:39,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:47:39,300 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:47:39,300 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:47:39,300 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:47:39,300 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:47:39,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:47:39,301 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:47:39,301 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:47:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-28 08:47:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:47:39,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:39,336 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 08:47:39,337 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:39,346 INFO L82 PathProgramCache]: Analyzing trace with hash 820387366, now seen corresponding path program 1 times [2020-10-28 08:47:39,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:39,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268646010] [2020-10-28 08:47:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:40,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:47:40,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:40,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-28 08:47:40,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:40,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:40,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:40,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:47:40,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:40,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:40,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:40,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:47:40,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:40,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:40,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268646010] [2020-10-28 08:47:40,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:40,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:47:40,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374350407] [2020-10-28 08:47:40,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:47:40,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:47:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:40,298 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-28 08:47:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:40,425 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2020-10-28 08:47:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:47:40,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-28 08:47:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:40,436 INFO L225 Difference]: With dead ends: 73 [2020-10-28 08:47:40,437 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 08:47:40,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 08:47:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 08:47:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:47:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-28 08:47:40,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2020-10-28 08:47:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:40,487 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-28 08:47:40,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:47:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-28 08:47:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:47:40,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:40,490 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 08:47:40,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:47:40,490 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:40,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1435305744, now seen corresponding path program 1 times [2020-10-28 08:47:40,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:40,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191823614] [2020-10-28 08:47:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:40,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:47:41,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-28 08:47:41,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:47:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:47:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:47:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:41,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:41,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:41,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:47:41,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:41,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191823614] [2020-10-28 08:47:41,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:41,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:47:41,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330187433] [2020-10-28 08:47:41,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:47:41,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:41,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:47:41,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:41,122 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-10-28 08:47:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:41,240 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-10-28 08:47:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:47:41,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 08:47:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:41,242 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:47:41,242 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 08:47:41,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 08:47:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-28 08:47:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:47:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-28 08:47:41,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 19 [2020-10-28 08:47:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:41,253 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-28 08:47:41,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:47:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-28 08:47:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:47:41,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:41,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:41,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:47:41,255 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -4092729, now seen corresponding path program 1 times [2020-10-28 08:47:41,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:41,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711334212] [2020-10-28 08:47:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:42,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:47:42,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:42,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-28 08:47:42,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:42,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:42,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:42,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:47:42,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:47:42,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:42,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:42,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:42,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:42,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:47:42,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:42,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:42,359 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 08:47:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711334212] [2020-10-28 08:47:42,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:42,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:47:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932715319] [2020-10-28 08:47:42,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:42,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:42,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:42,362 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 5 states. [2020-10-28 08:47:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:42,498 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-10-28 08:47:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:47:42,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 08:47:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:42,499 INFO L225 Difference]: With dead ends: 73 [2020-10-28 08:47:42,500 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:47:42,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:47:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-28 08:47:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:47:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-28 08:47:42,509 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2020-10-28 08:47:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:42,510 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-28 08:47:42,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-28 08:47:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:47:42,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:42,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:42,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:47:42,512 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash 364493740, now seen corresponding path program 2 times [2020-10-28 08:47:42,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:42,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372921855] [2020-10-28 08:47:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:45,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:47:45,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:45,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3278 [2020-10-28 08:47:45,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:45,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:47:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:47:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:47:45,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:45,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:45,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:45,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:45,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:45,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:45,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:45,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:45,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372921855] [2020-10-28 08:47:45,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:45,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:47:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484866423] [2020-10-28 08:47:45,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:47:45,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:47:45,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:45,878 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 6 states. [2020-10-28 08:47:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:46,011 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2020-10-28 08:47:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:47:46,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 08:47:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:46,013 INFO L225 Difference]: With dead ends: 83 [2020-10-28 08:47:46,013 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:47:46,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:47:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-28 08:47:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:47:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-28 08:47:46,023 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2020-10-28 08:47:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:46,023 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-28 08:47:46,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:47:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-28 08:47:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:47:46,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:46,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:46,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:47:46,026 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -603824085, now seen corresponding path program 3 times [2020-10-28 08:47:46,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:46,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41783350] [2020-10-28 08:47:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:51,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:47:51,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:51,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:47:51,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:51,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:47:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:47:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:47:51,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:51,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:51,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:51,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:51,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:47:51,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:51,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:51,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:51,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:47:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41783350] [2020-10-28 08:47:51,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:51,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:47:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568836107] [2020-10-28 08:47:51,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:47:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:47:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:47:51,151 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 7 states. [2020-10-28 08:47:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:51,326 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-10-28 08:47:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:47:51,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-28 08:47:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:51,328 INFO L225 Difference]: With dead ends: 93 [2020-10-28 08:47:51,328 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:47:51,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:47:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:47:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-28 08:47:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:47:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-28 08:47:51,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 34 [2020-10-28 08:47:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:51,342 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-28 08:47:51,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:47:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-28 08:47:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:47:51,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:51,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:51,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:47:51,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1788137544, now seen corresponding path program 4 times [2020-10-28 08:47:51,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:51,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101239972] [2020-10-28 08:47:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:51,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:47:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:47:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:47:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:56,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:47:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:47:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:47:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:56,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:56,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:56,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:56,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:47:56,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:56,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:56,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:56,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:47:56,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101239972] [2020-10-28 08:47:56,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:56,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:47:56,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839278530] [2020-10-28 08:47:56,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:47:56,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:47:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:47:56,457 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2020-10-28 08:47:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:56,596 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2020-10-28 08:47:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:47:56,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 08:47:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:56,598 INFO L225 Difference]: With dead ends: 103 [2020-10-28 08:47:56,598 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 08:47:56,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:47:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 08:47:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-28 08:47:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:47:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2020-10-28 08:47:56,606 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 39 [2020-10-28 08:47:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:56,607 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2020-10-28 08:47:56,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:47:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2020-10-28 08:47:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:47:56,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:56,608 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:56,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:47:56,608 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1464988559, now seen corresponding path program 5 times [2020-10-28 08:47:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:56,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898480189] [2020-10-28 08:47:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:56,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:01,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:01,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:48:01,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:01,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:48:01,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:01,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:01,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:48:01,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:48:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:48:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:01,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:01,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:01,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:01,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:01,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:01,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:01,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:01,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:48:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898480189] [2020-10-28 08:48:01,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:01,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:48:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119607] [2020-10-28 08:48:01,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:48:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:48:01,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:48:01,717 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 9 states. [2020-10-28 08:48:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:01,887 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2020-10-28 08:48:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:48:01,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-28 08:48:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:01,889 INFO L225 Difference]: With dead ends: 113 [2020-10-28 08:48:01,889 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 08:48:01,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:48:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 08:48:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-28 08:48:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:48:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-10-28 08:48:01,897 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 44 [2020-10-28 08:48:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:01,897 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-10-28 08:48:01,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:48:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-10-28 08:48:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:48:01,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:01,899 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:01,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:48:01,899 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 12846308, now seen corresponding path program 6 times [2020-10-28 08:48:01,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:01,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030958440] [2020-10-28 08:48:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:01,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:06,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:06,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:48:06,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:48:06,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:06,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:48:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:48:06,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:07,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:07,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:48:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030958440] [2020-10-28 08:48:07,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:07,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182340967] [2020-10-28 08:48:07,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:07,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:07,031 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 10 states. [2020-10-28 08:48:07,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:07,216 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2020-10-28 08:48:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:48:07,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 08:48:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:07,217 INFO L225 Difference]: With dead ends: 123 [2020-10-28 08:48:07,217 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:48:07,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:48:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-28 08:48:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:48:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-28 08:48:07,231 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 49 [2020-10-28 08:48:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:07,232 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-28 08:48:07,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-28 08:48:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 08:48:07,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:07,233 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:48:07,233 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash 961185523, now seen corresponding path program 7 times [2020-10-28 08:48:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:07,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512520023] [2020-10-28 08:48:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:07,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:12,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:48:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 08:48:12,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:12,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:12,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:12,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:12,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:12,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:48:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512520023] [2020-10-28 08:48:12,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:12,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:48:12,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508719336] [2020-10-28 08:48:12,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:48:12,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:12,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:48:12,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:48:12,389 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 11 states. [2020-10-28 08:48:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:12,577 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2020-10-28 08:48:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:48:12,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-28 08:48:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:12,579 INFO L225 Difference]: With dead ends: 133 [2020-10-28 08:48:12,579 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:48:12,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:48:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:48:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-28 08:48:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:48:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-10-28 08:48:12,592 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 54 [2020-10-28 08:48:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:12,593 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-10-28 08:48:12,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:48:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-10-28 08:48:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:48:12,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:12,597 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:12,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:48:12,597 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1668094336, now seen corresponding path program 8 times [2020-10-28 08:48:12,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:12,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398844599] [2020-10-28 08:48:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:13,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:17,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:17,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:17,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:48:17,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:48:17,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:17,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:17,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:17,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:17,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:17,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:48:17,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398844599] [2020-10-28 08:48:17,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:17,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:17,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995432924] [2020-10-28 08:48:17,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:17,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:17,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:17,743 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-10-28 08:48:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:17,934 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2020-10-28 08:48:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:48:17,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-28 08:48:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:17,936 INFO L225 Difference]: With dead ends: 143 [2020-10-28 08:48:17,936 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 08:48:17,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 08:48:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-28 08:48:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:48:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-10-28 08:48:17,949 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 59 [2020-10-28 08:48:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:17,949 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-10-28 08:48:17,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-10-28 08:48:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:48:17,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:17,952 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:17,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:48:17,952 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -586786217, now seen corresponding path program 9 times [2020-10-28 08:48:17,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:17,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94539460] [2020-10-28 08:48:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:17,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:22,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:22,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 08:48:22,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:22,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:48:22,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:22,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:48:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:48:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 08:48:22,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:48:23,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:23,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:23,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:23,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:23,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:23,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:48:23,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94539460] [2020-10-28 08:48:23,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:23,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:48:23,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004199632] [2020-10-28 08:48:23,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:48:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:48:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:48:23,133 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 13 states. [2020-10-28 08:48:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:23,342 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2020-10-28 08:48:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:48:23,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-28 08:48:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:23,344 INFO L225 Difference]: With dead ends: 153 [2020-10-28 08:48:23,344 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 08:48:23,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:48:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 08:48:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-28 08:48:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 08:48:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-10-28 08:48:23,353 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 64 [2020-10-28 08:48:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:23,354 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-10-28 08:48:23,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:48:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-10-28 08:48:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:48:23,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:23,355 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:23,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:48:23,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 406179356, now seen corresponding path program 10 times [2020-10-28 08:48:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:23,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265345186] [2020-10-28 08:48:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:23,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:28,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:48:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:48:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:28,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:48:28,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265345186] [2020-10-28 08:48:28,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:28,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:48:28,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28526690] [2020-10-28 08:48:28,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:48:28,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:28,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:48:28,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:28,515 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 14 states. [2020-10-28 08:48:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:28,679 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2020-10-28 08:48:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:48:28,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-28 08:48:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:28,680 INFO L225 Difference]: With dead ends: 163 [2020-10-28 08:48:28,680 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 08:48:28,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 08:48:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-28 08:48:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:48:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 124 transitions. [2020-10-28 08:48:28,686 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 124 transitions. Word has length 69 [2020-10-28 08:48:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:28,686 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 124 transitions. [2020-10-28 08:48:28,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:48:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 124 transitions. [2020-10-28 08:48:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 08:48:28,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:28,688 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:28,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:48:28,688 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash 354397627, now seen corresponding path program 11 times [2020-10-28 08:48:28,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:28,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111352543] [2020-10-28 08:48:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:31,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:33,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:48:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:33,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:33,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:33,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:33,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:33,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:33,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:33,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:48:33,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111352543] [2020-10-28 08:48:33,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:33,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:48:33,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422971691] [2020-10-28 08:48:33,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:48:33,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:48:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:48:33,866 INFO L87 Difference]: Start difference. First operand 96 states and 124 transitions. Second operand 15 states. [2020-10-28 08:48:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:34,156 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2020-10-28 08:48:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:48:34,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-28 08:48:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:34,158 INFO L225 Difference]: With dead ends: 173 [2020-10-28 08:48:34,158 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 08:48:34,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:48:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 08:48:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-28 08:48:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:48:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-10-28 08:48:34,173 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 74 [2020-10-28 08:48:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:34,173 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-10-28 08:48:34,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:48:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-10-28 08:48:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:48:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:34,181 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:34,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:48:34,181 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1153178952, now seen corresponding path program 12 times [2020-10-28 08:48:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:34,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382345157] [2020-10-28 08:48:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:48:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:48:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:48:39,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:39,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:39,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:39,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:39,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:39,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:48:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382345157] [2020-10-28 08:48:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:39,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:48:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967927802] [2020-10-28 08:48:39,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:48:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:48:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:48:39,446 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 16 states. [2020-10-28 08:48:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:39,715 INFO L93 Difference]: Finished difference Result 183 states and 248 transitions. [2020-10-28 08:48:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:48:39,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-28 08:48:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:39,718 INFO L225 Difference]: With dead ends: 183 [2020-10-28 08:48:39,718 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 08:48:39,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:48:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 08:48:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-28 08:48:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:48:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2020-10-28 08:48:39,730 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 79 [2020-10-28 08:48:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:39,730 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2020-10-28 08:48:39,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:48:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2020-10-28 08:48:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:48:39,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:39,731 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:39,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:48:39,731 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash 263242015, now seen corresponding path program 13 times [2020-10-28 08:48:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:39,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105697146] [2020-10-28 08:48:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:44,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:48:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:48:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:48:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:44,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:44,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:44,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:44,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:44,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:44,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:44,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:44,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:48:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105697146] [2020-10-28 08:48:44,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:44,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:48:44,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815389509] [2020-10-28 08:48:44,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:48:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:48:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:48:44,968 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand 17 states. [2020-10-28 08:48:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:45,245 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2020-10-28 08:48:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:48:45,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 84 [2020-10-28 08:48:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:45,247 INFO L225 Difference]: With dead ends: 193 [2020-10-28 08:48:45,247 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 08:48:45,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:48:45,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 08:48:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-28 08:48:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:48:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2020-10-28 08:48:45,257 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 84 [2020-10-28 08:48:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:45,258 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2020-10-28 08:48:45,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:48:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2020-10-28 08:48:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:48:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:45,259 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:45,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:48:45,259 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 456988500, now seen corresponding path program 14 times [2020-10-28 08:48:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491507312] [2020-10-28 08:48:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:45,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:50,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:50,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:48:50,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:48:50,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:48:50,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:50,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:48:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:48:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:48:50,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:50,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:50,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:50,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 08:48:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491507312] [2020-10-28 08:48:50,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:50,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:48:50,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144330711] [2020-10-28 08:48:50,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:48:50,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:48:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:50,488 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand 18 states. [2020-10-28 08:48:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:50,771 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2020-10-28 08:48:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:48:50,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-28 08:48:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:50,774 INFO L225 Difference]: With dead ends: 203 [2020-10-28 08:48:50,774 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:48:50,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:48:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-28 08:48:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:48:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2020-10-28 08:48:50,780 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 89 [2020-10-28 08:48:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:50,781 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2020-10-28 08:48:50,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:48:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2020-10-28 08:48:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:48:50,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:50,782 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:50,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:48:50,782 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash 978572419, now seen corresponding path program 15 times [2020-10-28 08:48:50,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:50,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845403846] [2020-10-28 08:48:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:55,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 08:48:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:56,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:56,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:56,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:48:56,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845403846] [2020-10-28 08:48:56,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:56,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:48:56,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951576824] [2020-10-28 08:48:56,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:48:56,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:56,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:48:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:48:56,043 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand 19 states. [2020-10-28 08:48:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:56,398 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2020-10-28 08:48:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:48:56,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-28 08:48:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:56,399 INFO L225 Difference]: With dead ends: 213 [2020-10-28 08:48:56,399 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 08:48:56,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:48:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 08:48:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-28 08:48:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 08:48:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2020-10-28 08:48:56,416 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 94 [2020-10-28 08:48:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:56,416 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2020-10-28 08:48:56,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:48:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2020-10-28 08:48:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:48:56,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:56,420 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:56,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:48:56,420 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1430727664, now seen corresponding path program 16 times [2020-10-28 08:48:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:56,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484551811] [2020-10-28 08:48:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:01,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:01,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:49:01,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:01,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:49:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:01,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:01,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:01,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:01,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:01,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:49:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484551811] [2020-10-28 08:49:01,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:01,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:49:01,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374141974] [2020-10-28 08:49:01,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:49:01,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:49:01,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:49:01,694 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand 20 states. [2020-10-28 08:49:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:01,986 INFO L93 Difference]: Finished difference Result 223 states and 304 transitions. [2020-10-28 08:49:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:49:01,986 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-28 08:49:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:01,988 INFO L225 Difference]: With dead ends: 223 [2020-10-28 08:49:01,988 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 08:49:01,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:49:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 08:49:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-28 08:49:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 08:49:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2020-10-28 08:49:01,996 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 99 [2020-10-28 08:49:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:01,997 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2020-10-28 08:49:01,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:49:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2020-10-28 08:49:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 08:49:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:01,998 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:01,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:49:01,998 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash 639838183, now seen corresponding path program 17 times [2020-10-28 08:49:01,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:01,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778448082] [2020-10-28 08:49:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:02,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 08:49:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:07,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:07,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:49:07,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778448082] [2020-10-28 08:49:07,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:07,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:49:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808170586] [2020-10-28 08:49:07,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:49:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:49:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:49:07,288 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand 21 states. [2020-10-28 08:49:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:07,658 INFO L93 Difference]: Finished difference Result 233 states and 318 transitions. [2020-10-28 08:49:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:49:07,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-10-28 08:49:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:07,660 INFO L225 Difference]: With dead ends: 233 [2020-10-28 08:49:07,660 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 08:49:07,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:49:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 08:49:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-28 08:49:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:49:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2020-10-28 08:49:07,668 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 104 [2020-10-28 08:49:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:07,668 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2020-10-28 08:49:07,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:49:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2020-10-28 08:49:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 08:49:07,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:07,670 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:07,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:49:07,670 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -251142004, now seen corresponding path program 18 times [2020-10-28 08:49:07,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:07,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785406082] [2020-10-28 08:49:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:07,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:49:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:49:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:49:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:12,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:12,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:49:13,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785406082] [2020-10-28 08:49:13,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:13,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:49:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652213636] [2020-10-28 08:49:13,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:49:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:49:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:49:13,011 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand 22 states. [2020-10-28 08:49:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:13,322 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2020-10-28 08:49:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:49:13,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-10-28 08:49:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:13,324 INFO L225 Difference]: With dead ends: 243 [2020-10-28 08:49:13,324 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 08:49:13,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:49:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 08:49:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-28 08:49:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:49:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 188 transitions. [2020-10-28 08:49:13,333 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 188 transitions. Word has length 109 [2020-10-28 08:49:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:13,334 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 188 transitions. [2020-10-28 08:49:13,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:49:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 188 transitions. [2020-10-28 08:49:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 08:49:13,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:13,336 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:13,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:49:13,336 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1807285067, now seen corresponding path program 19 times [2020-10-28 08:49:13,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:13,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322780981] [2020-10-28 08:49:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:18,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 08:49:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:18,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:18,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:18,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:18,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 08:49:18,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322780981] [2020-10-28 08:49:18,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:18,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:49:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869034763] [2020-10-28 08:49:18,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:49:18,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:49:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:49:18,701 INFO L87 Difference]: Start difference. First operand 144 states and 188 transitions. Second operand 23 states. [2020-10-28 08:49:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:19,061 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2020-10-28 08:49:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:49:19,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-28 08:49:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:19,062 INFO L225 Difference]: With dead ends: 253 [2020-10-28 08:49:19,062 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 08:49:19,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:49:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 08:49:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-28 08:49:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 08:49:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2020-10-28 08:49:19,070 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 114 [2020-10-28 08:49:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:19,071 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2020-10-28 08:49:19,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:49:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2020-10-28 08:49:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:49:19,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:19,072 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:19,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:49:19,073 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash -56298200, now seen corresponding path program 20 times [2020-10-28 08:49:19,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:19,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863836048] [2020-10-28 08:49:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:19,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 08:49:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:24,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:24,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 08:49:24,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863836048] [2020-10-28 08:49:24,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:24,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:49:24,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48947153] [2020-10-28 08:49:24,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:49:24,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:49:24,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:49:24,434 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand 24 states. [2020-10-28 08:49:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:24,823 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2020-10-28 08:49:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:49:24,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 119 [2020-10-28 08:49:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:24,828 INFO L225 Difference]: With dead ends: 263 [2020-10-28 08:49:24,828 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:49:24,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:49:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:49:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-28 08:49:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:49:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2020-10-28 08:49:24,836 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 119 [2020-10-28 08:49:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:24,836 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2020-10-28 08:49:24,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:49:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2020-10-28 08:49:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 08:49:24,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:24,838 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:24,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:49:24,838 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:24,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1892708689, now seen corresponding path program 21 times [2020-10-28 08:49:24,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:24,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214263245] [2020-10-28 08:49:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:24,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:29,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:49:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:30,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:30,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:30,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:30,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:30,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:30,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 08:49:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214263245] [2020-10-28 08:49:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:30,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:49:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356298882] [2020-10-28 08:49:30,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:49:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:49:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:49:30,242 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand 25 states. [2020-10-28 08:49:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:30,691 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2020-10-28 08:49:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:49:30,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-10-28 08:49:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:30,693 INFO L225 Difference]: With dead ends: 273 [2020-10-28 08:49:30,693 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 08:49:30,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:49:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 08:49:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-28 08:49:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 08:49:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2020-10-28 08:49:30,702 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 124 [2020-10-28 08:49:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:30,703 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2020-10-28 08:49:30,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:49:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2020-10-28 08:49:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 08:49:30,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:30,705 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:30,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:49:30,705 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 683944388, now seen corresponding path program 22 times [2020-10-28 08:49:30,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:30,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631890448] [2020-10-28 08:49:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:35,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:49:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 08:49:35,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 08:49:35,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:36,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:36,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:36,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 08:49:36,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631890448] [2020-10-28 08:49:36,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:36,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:49:36,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493106173] [2020-10-28 08:49:36,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:49:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:49:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:49:36,187 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand 26 states. [2020-10-28 08:49:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:36,624 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2020-10-28 08:49:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:49:36,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-28 08:49:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:36,626 INFO L225 Difference]: With dead ends: 283 [2020-10-28 08:49:36,626 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 08:49:36,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:49:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 08:49:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-28 08:49:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 08:49:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 220 transitions. [2020-10-28 08:49:36,636 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 220 transitions. Word has length 129 [2020-10-28 08:49:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:36,636 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 220 transitions. [2020-10-28 08:49:36,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:49:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 220 transitions. [2020-10-28 08:49:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 08:49:36,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:36,638 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:36,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:49:36,638 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash -467590637, now seen corresponding path program 23 times [2020-10-28 08:49:36,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:36,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505461682] [2020-10-28 08:49:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:36,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 08:49:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:49:41,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:41,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:49:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 08:49:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 08:49:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:42,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:42,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:42,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:42,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 08:49:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505461682] [2020-10-28 08:49:42,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:42,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:49:42,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805445300] [2020-10-28 08:49:42,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:49:42,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:49:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:49:42,076 INFO L87 Difference]: Start difference. First operand 168 states and 220 transitions. Second operand 27 states. [2020-10-28 08:49:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:42,470 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2020-10-28 08:49:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:49:42,471 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2020-10-28 08:49:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:42,472 INFO L225 Difference]: With dead ends: 293 [2020-10-28 08:49:42,472 INFO L226 Difference]: Without dead ends: 178 [2020-10-28 08:49:42,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:49:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-28 08:49:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-28 08:49:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:49:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 228 transitions. [2020-10-28 08:49:42,481 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 228 transitions. Word has length 134 [2020-10-28 08:49:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:42,481 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 228 transitions. [2020-10-28 08:49:42,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:49:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 228 transitions. [2020-10-28 08:49:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 08:49:42,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:42,482 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:42,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:49:42,483 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -460636576, now seen corresponding path program 24 times [2020-10-28 08:49:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:42,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043193365] [2020-10-28 08:49:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:42,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:47,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 08:49:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:47,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:47,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:47,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 08:49:47,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043193365] [2020-10-28 08:49:47,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:47,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:49:47,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009126016] [2020-10-28 08:49:47,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:49:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:49:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:49:47,953 INFO L87 Difference]: Start difference. First operand 174 states and 228 transitions. Second operand 28 states. [2020-10-28 08:49:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:48,433 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2020-10-28 08:49:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:49:48,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-10-28 08:49:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:48,435 INFO L225 Difference]: With dead ends: 303 [2020-10-28 08:49:48,435 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 08:49:48,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:49:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 08:49:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-28 08:49:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 08:49:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 236 transitions. [2020-10-28 08:49:48,443 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 236 transitions. Word has length 139 [2020-10-28 08:49:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:48,443 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 236 transitions. [2020-10-28 08:49:48,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:49:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 236 transitions. [2020-10-28 08:49:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 08:49:48,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:48,445 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:48,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:49:48,445 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1906832759, now seen corresponding path program 25 times [2020-10-28 08:49:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:48,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428829286] [2020-10-28 08:49:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:53,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:53,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 08:49:53,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:49:53,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 08:49:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:53,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 08:49:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428829286] [2020-10-28 08:49:53,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:53,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:49:53,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635383755] [2020-10-28 08:49:53,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:49:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:49:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:49:53,968 INFO L87 Difference]: Start difference. First operand 180 states and 236 transitions. Second operand 29 states. [2020-10-28 08:49:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:54,460 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2020-10-28 08:49:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:49:54,460 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2020-10-28 08:49:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:54,462 INFO L225 Difference]: With dead ends: 313 [2020-10-28 08:49:54,462 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 08:49:54,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:49:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 08:49:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-28 08:49:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:49:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 244 transitions. [2020-10-28 08:49:54,471 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 244 transitions. Word has length 144 [2020-10-28 08:49:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:54,472 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 244 transitions. [2020-10-28 08:49:54,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:49:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 244 transitions. [2020-10-28 08:49:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:49:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:54,473 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:54,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:49:54,473 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2040525564, now seen corresponding path program 26 times [2020-10-28 08:49:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:54,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971084965] [2020-10-28 08:49:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:58,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:49:59,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 08:49:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:49:59,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:00,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:00,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:00,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:00,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:00,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 08:50:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971084965] [2020-10-28 08:50:00,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:00,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:50:00,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605707245] [2020-10-28 08:50:00,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:50:00,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:50:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:50:00,059 INFO L87 Difference]: Start difference. First operand 186 states and 244 transitions. Second operand 30 states. [2020-10-28 08:50:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:00,578 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2020-10-28 08:50:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:50:00,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-10-28 08:50:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:00,580 INFO L225 Difference]: With dead ends: 323 [2020-10-28 08:50:00,580 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 08:50:00,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:50:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 08:50:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-28 08:50:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 08:50:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2020-10-28 08:50:00,589 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 149 [2020-10-28 08:50:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:00,589 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2020-10-28 08:50:00,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:50:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2020-10-28 08:50:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 08:50:00,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:00,591 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:00,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:50:00,591 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash -698464037, now seen corresponding path program 27 times [2020-10-28 08:50:00,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:00,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680230115] [2020-10-28 08:50:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:00,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:02,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:05,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:05,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:50:05,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:06,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:06,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:06,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:06,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:06,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:06,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 08:50:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680230115] [2020-10-28 08:50:06,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:06,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:50:06,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377768867] [2020-10-28 08:50:06,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:50:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:50:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:50:06,351 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand 31 states. [2020-10-28 08:50:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:06,886 INFO L93 Difference]: Finished difference Result 326 states and 446 transitions. [2020-10-28 08:50:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:50:06,887 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2020-10-28 08:50:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:06,889 INFO L225 Difference]: With dead ends: 326 [2020-10-28 08:50:06,889 INFO L226 Difference]: Without dead ends: 195 [2020-10-28 08:50:06,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:50:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-28 08:50:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-28 08:50:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 08:50:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-10-28 08:50:06,900 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 154 [2020-10-28 08:50:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:06,900 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-10-28 08:50:06,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:50:06,900 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-10-28 08:50:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 08:50:06,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:06,901 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:06,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:50:06,902 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash 105463933, now seen corresponding path program 28 times [2020-10-28 08:50:06,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:06,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88888706] [2020-10-28 08:50:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:09,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:11,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:11,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 08:50:11,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:50:11,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:12,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:12,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:12,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:12,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:12,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:12,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:12,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:12,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:12,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:50:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 08:50:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88888706] [2020-10-28 08:50:12,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:12,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:50:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955643970] [2020-10-28 08:50:12,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:50:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:12,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:50:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:50:12,534 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 32 states. [2020-10-28 08:50:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:13,064 INFO L93 Difference]: Finished difference Result 331 states and 453 transitions. [2020-10-28 08:50:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:50:13,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-28 08:50:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:13,066 INFO L225 Difference]: With dead ends: 331 [2020-10-28 08:50:13,066 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 08:50:13,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:50:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 08:50:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2020-10-28 08:50:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 08:50:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2020-10-28 08:50:13,077 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 156 [2020-10-28 08:50:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:13,077 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2020-10-28 08:50:13,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:50:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2020-10-28 08:50:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-28 08:50:13,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:13,079 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:13,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:50:13,079 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash -413870177, now seen corresponding path program 29 times [2020-10-28 08:50:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:13,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002795074] [2020-10-28 08:50:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:18,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:18,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 08:50:18,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 08:50:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:18,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:18,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:18,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:18,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:18,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:18,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:50:18,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002795074] [2020-10-28 08:50:18,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:18,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:50:18,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527091312] [2020-10-28 08:50:18,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:50:18,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:50:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:50:18,678 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand 31 states. [2020-10-28 08:50:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:19,217 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2020-10-28 08:50:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:50:19,218 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 158 [2020-10-28 08:50:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:19,220 INFO L225 Difference]: With dead ends: 222 [2020-10-28 08:50:19,220 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 08:50:19,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:50:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 08:50:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2020-10-28 08:50:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 08:50:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2020-10-28 08:50:19,230 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 158 [2020-10-28 08:50:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:19,230 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-28 08:50:19,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:50:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2020-10-28 08:50:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 08:50:19,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:19,232 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:19,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:50:19,233 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash -336558794, now seen corresponding path program 30 times [2020-10-28 08:50:19,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:19,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175043139] [2020-10-28 08:50:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:19,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:21,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:23,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:24,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5387 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 08:50:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:25,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:25,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:25,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:25,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:50:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175043139] [2020-10-28 08:50:25,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:25,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:50:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676306354] [2020-10-28 08:50:25,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:50:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:50:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:50:25,215 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand 32 states. [2020-10-28 08:50:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:25,702 INFO L93 Difference]: Finished difference Result 227 states and 297 transitions. [2020-10-28 08:50:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:50:25,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2020-10-28 08:50:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:25,706 INFO L225 Difference]: With dead ends: 227 [2020-10-28 08:50:25,707 INFO L226 Difference]: Without dead ends: 208 [2020-10-28 08:50:25,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:50:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-28 08:50:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-28 08:50:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 08:50:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 268 transitions. [2020-10-28 08:50:25,720 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 268 transitions. Word has length 161 [2020-10-28 08:50:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:25,721 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 268 transitions. [2020-10-28 08:50:25,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:50:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 268 transitions. [2020-10-28 08:50:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 08:50:25,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:25,722 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:25,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:50:25,723 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash 744381503, now seen corresponding path program 31 times [2020-10-28 08:50:25,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:25,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702570604] [2020-10-28 08:50:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:25,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:28,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:30,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:30,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 08:50:30,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 08:50:30,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:30,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:50:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 08:50:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 08:50:30,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:31,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:50:31,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702570604] [2020-10-28 08:50:31,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:31,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:50:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230544809] [2020-10-28 08:50:31,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:50:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:50:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:50:31,411 INFO L87 Difference]: Start difference. First operand 204 states and 268 transitions. Second operand 33 states. [2020-10-28 08:50:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:31,963 INFO L93 Difference]: Finished difference Result 353 states and 486 transitions. [2020-10-28 08:50:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:50:31,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 164 [2020-10-28 08:50:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:31,966 INFO L225 Difference]: With dead ends: 353 [2020-10-28 08:50:31,966 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 08:50:31,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:50:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 08:50:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-28 08:50:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 08:50:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 276 transitions. [2020-10-28 08:50:31,976 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 276 transitions. Word has length 164 [2020-10-28 08:50:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:31,977 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 276 transitions. [2020-10-28 08:50:31,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:50:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 276 transitions. [2020-10-28 08:50:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 08:50:31,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:31,978 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:31,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:50:31,978 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1120484404, now seen corresponding path program 32 times [2020-10-28 08:50:31,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:31,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237243477] [2020-10-28 08:50:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:32,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:34,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:37,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:37,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 08:50:37,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:37,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 08:50:37,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:37,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:50:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 08:50:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 08:50:37,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:37,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:37,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:37,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 08:50:37,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237243477] [2020-10-28 08:50:37,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:37,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:50:37,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879396947] [2020-10-28 08:50:37,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:50:37,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:37,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:50:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:50:37,718 INFO L87 Difference]: Start difference. First operand 210 states and 276 transitions. Second operand 34 states. [2020-10-28 08:50:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:38,211 INFO L93 Difference]: Finished difference Result 363 states and 500 transitions. [2020-10-28 08:50:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:50:38,211 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 169 [2020-10-28 08:50:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:38,214 INFO L225 Difference]: With dead ends: 363 [2020-10-28 08:50:38,214 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 08:50:38,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:50:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 08:50:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-28 08:50:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-28 08:50:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2020-10-28 08:50:38,224 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 169 [2020-10-28 08:50:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:38,224 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2020-10-28 08:50:38,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:50:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2020-10-28 08:50:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 08:50:38,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:38,226 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:38,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:50:38,226 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -314413149, now seen corresponding path program 33 times [2020-10-28 08:50:38,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:38,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384482843] [2020-10-28 08:50:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:43,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:50:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 08:50:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 08:50:43,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:43,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:43,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 08:50:43,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384482843] [2020-10-28 08:50:43,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:43,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:50:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804531946] [2020-10-28 08:50:43,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:50:43,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:50:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:50:43,956 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand 35 states. [2020-10-28 08:50:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:44,585 INFO L93 Difference]: Finished difference Result 373 states and 514 transitions. [2020-10-28 08:50:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 08:50:44,585 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 174 [2020-10-28 08:50:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:44,587 INFO L225 Difference]: With dead ends: 373 [2020-10-28 08:50:44,587 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 08:50:44,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:50:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 08:50:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-28 08:50:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 08:50:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 292 transitions. [2020-10-28 08:50:44,598 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 292 transitions. Word has length 174 [2020-10-28 08:50:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:44,599 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 292 transitions. [2020-10-28 08:50:44,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:50:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 292 transitions. [2020-10-28 08:50:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 08:50:44,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:44,600 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:44,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:50:44,600 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1252610256, now seen corresponding path program 34 times [2020-10-28 08:50:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:44,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402332573] [2020-10-28 08:50:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:44,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:48,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:49,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:49,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 08:50:49,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:49,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 08:50:49,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:50,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:50,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:50,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:50,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-28 08:50:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402332573] [2020-10-28 08:50:50,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:50,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 08:50:50,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961410557] [2020-10-28 08:50:50,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 08:50:50,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:50,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 08:50:50,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:50:50,399 INFO L87 Difference]: Start difference. First operand 222 states and 292 transitions. Second operand 36 states. [2020-10-28 08:50:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:51,091 INFO L93 Difference]: Finished difference Result 383 states and 528 transitions. [2020-10-28 08:50:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 08:50:51,092 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 179 [2020-10-28 08:50:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:51,094 INFO L225 Difference]: With dead ends: 383 [2020-10-28 08:50:51,095 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 08:50:51,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:50:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 08:50:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-28 08:50:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 08:50:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 300 transitions. [2020-10-28 08:50:51,106 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 300 transitions. Word has length 179 [2020-10-28 08:50:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:51,106 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 300 transitions. [2020-10-28 08:50:51,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 08:50:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 300 transitions. [2020-10-28 08:50:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 08:50:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:51,108 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:51,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:50:51,108 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -702233849, now seen corresponding path program 35 times [2020-10-28 08:50:51,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:51,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501429312] [2020-10-28 08:50:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:51,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:56,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 08:50:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:56,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:56,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:56,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:56,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:56,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:50:56,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:56,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-28 08:50:56,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501429312] [2020-10-28 08:50:56,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:56,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 08:50:56,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474853071] [2020-10-28 08:50:56,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 08:50:56,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 08:50:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:50:56,968 INFO L87 Difference]: Start difference. First operand 228 states and 300 transitions. Second operand 37 states. [2020-10-28 08:50:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:57,649 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2020-10-28 08:50:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 08:50:57,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 184 [2020-10-28 08:50:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:57,652 INFO L225 Difference]: With dead ends: 393 [2020-10-28 08:50:57,653 INFO L226 Difference]: Without dead ends: 238 [2020-10-28 08:50:57,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:50:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-28 08:50:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-28 08:50:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 08:50:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2020-10-28 08:50:57,663 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 184 [2020-10-28 08:50:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:57,663 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2020-10-28 08:50:57,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 08:50:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2020-10-28 08:50:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 08:50:57,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:57,665 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:57,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:50:57,665 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash 191759724, now seen corresponding path program 36 times [2020-10-28 08:50:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:57,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573623994] [2020-10-28 08:50:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 08:51:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:03,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-28 08:51:03,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573623994] [2020-10-28 08:51:03,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:03,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 08:51:03,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885401114] [2020-10-28 08:51:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 08:51:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 08:51:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:51:03,530 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand 38 states. [2020-10-28 08:51:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:04,153 INFO L93 Difference]: Finished difference Result 396 states and 544 transitions. [2020-10-28 08:51:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:51:04,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 189 [2020-10-28 08:51:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:04,156 INFO L225 Difference]: With dead ends: 396 [2020-10-28 08:51:04,156 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 08:51:04,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:51:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 08:51:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-10-28 08:51:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 08:51:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 310 transitions. [2020-10-28 08:51:04,165 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 310 transitions. Word has length 189 [2020-10-28 08:51:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:04,165 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 310 transitions. [2020-10-28 08:51:04,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 08:51:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 310 transitions. [2020-10-28 08:51:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 08:51:04,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,167 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:04,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:51:04,167 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1834394998, now seen corresponding path program 37 times [2020-10-28 08:51:04,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842131631] [2020-10-28 08:51:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5467 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 08:51:09,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:51:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-28 08:51:10,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842131631] [2020-10-28 08:51:10,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:10,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 08:51:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5331150] [2020-10-28 08:51:10,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 08:51:10,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:10,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 08:51:10,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:51:10,466 INFO L87 Difference]: Start difference. First operand 236 states and 310 transitions. Second operand 39 states. [2020-10-28 08:51:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:11,036 INFO L93 Difference]: Finished difference Result 401 states and 551 transitions. [2020-10-28 08:51:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 08:51:11,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 191 [2020-10-28 08:51:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:11,039 INFO L225 Difference]: With dead ends: 401 [2020-10-28 08:51:11,039 INFO L226 Difference]: Without dead ends: 242 [2020-10-28 08:51:11,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:51:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-28 08:51:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2020-10-28 08:51:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 08:51:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 312 transitions. [2020-10-28 08:51:11,047 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 312 transitions. Word has length 191 [2020-10-28 08:51:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:11,048 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 312 transitions. [2020-10-28 08:51:11,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 08:51:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 312 transitions. [2020-10-28 08:51:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 08:51:11,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:11,049 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:11,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:51:11,050 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 946069544, now seen corresponding path program 38 times [2020-10-28 08:51:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:11,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977076665] [2020-10-28 08:51:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 08:51:17,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:17,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5921 [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 08:51:17,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:17,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:17,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3013 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-28 08:51:17,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977076665] [2020-10-28 08:51:17,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:17,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 08:51:17,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207100063] [2020-10-28 08:51:17,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 08:51:17,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 08:51:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:51:17,872 INFO L87 Difference]: Start difference. First operand 238 states and 312 transitions. Second operand 40 states. [2020-10-28 08:51:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:18,451 INFO L93 Difference]: Finished difference Result 407 states and 560 transitions. [2020-10-28 08:51:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 08:51:18,452 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 193 [2020-10-28 08:51:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:18,454 INFO L225 Difference]: With dead ends: 407 [2020-10-28 08:51:18,454 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 08:51:18,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:51:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 08:51:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2020-10-28 08:51:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-28 08:51:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 320 transitions. [2020-10-28 08:51:18,464 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 320 transitions. Word has length 193 [2020-10-28 08:51:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:18,464 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 320 transitions. [2020-10-28 08:51:18,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 08:51:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 320 transitions. [2020-10-28 08:51:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 08:51:18,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:18,466 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:18,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:51:18,466 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:18,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1324281553, now seen corresponding path program 39 times [2020-10-28 08:51:18,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:18,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777264903] [2020-10-28 08:51:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 08:51:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 08:51:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:24,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-28 08:51:24,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777264903] [2020-10-28 08:51:24,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:24,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 08:51:24,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495439130] [2020-10-28 08:51:24,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 08:51:24,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 08:51:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:51:24,453 INFO L87 Difference]: Start difference. First operand 244 states and 320 transitions. Second operand 41 states. [2020-10-28 08:51:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:25,077 INFO L93 Difference]: Finished difference Result 417 states and 574 transitions. [2020-10-28 08:51:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 08:51:25,077 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 198 [2020-10-28 08:51:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:25,079 INFO L225 Difference]: With dead ends: 417 [2020-10-28 08:51:25,079 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 08:51:25,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:51:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 08:51:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2020-10-28 08:51:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 08:51:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 328 transitions. [2020-10-28 08:51:25,088 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 328 transitions. Word has length 198 [2020-10-28 08:51:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:25,088 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 328 transitions. [2020-10-28 08:51:25,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 08:51:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 328 transitions. [2020-10-28 08:51:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 08:51:25,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:25,090 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:25,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:51:25,090 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash 236829124, now seen corresponding path program 40 times [2020-10-28 08:51:25,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:25,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558222903] [2020-10-28 08:51:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking...