/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:31:06,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:31:06,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:31:06,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:31:06,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:31:06,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:31:06,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:31:06,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:31:06,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:31:06,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:31:06,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:31:06,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:31:06,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:31:06,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:31:06,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:31:06,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:31:06,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:31:06,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:31:06,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:31:06,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:31:06,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:31:06,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:31:06,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:31:06,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:31:06,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:31:06,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:31:06,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:31:06,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:31:06,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:31:06,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:31:06,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:31:06,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:31:06,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:31:06,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:31:06,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:31:06,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:31:06,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:31:06,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:31:06,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:31:06,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:31:06,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:31:06,514 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 [2020-10-29 03:31:06,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:31:06,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:31:06,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:31:06,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:31:06,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:31:06,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:31:06,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:31:06,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:31:06,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:31:06,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:31:06,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:31:06,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:31:06,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:31:06,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:31:06,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:31:06,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:31:06,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:31:06,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:31:06,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:31:06,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:31:06,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:31:06,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:31:06,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:31:06,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:31:06,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:31:06,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:31:06,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:31:06,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:31:06,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:31:06,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:31:06,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:31:06,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:31:07,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:31:07,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:31:07,002 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:31:07,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2020-10-29 03:31:07,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34075e957/d903e1edac894be886d18f41facbab8e/FLAGfa9bd41f6 [2020-10-29 03:31:07,755 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:31:07,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2020-10-29 03:31:07,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34075e957/d903e1edac894be886d18f41facbab8e/FLAGfa9bd41f6 [2020-10-29 03:31:08,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34075e957/d903e1edac894be886d18f41facbab8e [2020-10-29 03:31:08,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:31:08,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:31:08,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:31:08,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:31:08,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:31:08,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eca4553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08, skipping insertion in model container [2020-10-29 03:31:08,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:31:08,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:31:08,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:31:08,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:31:08,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:31:08,478 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:31:08,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08 WrapperNode [2020-10-29 03:31:08,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:31:08,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:31:08,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:31:08,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:31:08,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (1/1) ... [2020-10-29 03:31:08,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:31:08,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:31:08,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:31:08,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:31:08,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (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 [2020-10-29 03:31:08,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:31:08,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:31:08,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:31:08,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:31:08,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:31:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:31:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:31:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:31:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:31:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:31:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:31:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:31:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:31:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:31:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:31:09,068 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:31:09,069 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 03:31:09,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:31:09 BoogieIcfgContainer [2020-10-29 03:31:09,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:31:09,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:31:09,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:31:09,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:31:09,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:31:08" (1/3) ... [2020-10-29 03:31:09,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aadab93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:31:09, skipping insertion in model container [2020-10-29 03:31:09,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:31:08" (2/3) ... [2020-10-29 03:31:09,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aadab93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:31:09, skipping insertion in model container [2020-10-29 03:31:09,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:31:09" (3/3) ... [2020-10-29 03:31:09,088 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2020-10-29 03:31:09,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:31:09,110 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:31:09,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:31:09,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:31:09,172 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:31:09,172 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:31:09,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:31:09,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:31:09,173 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:31:09,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:31:09,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:31:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-29 03:31:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 03:31:09,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:09,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:09,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1399133640, now seen corresponding path program 1 times [2020-10-29 03:31:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:09,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056056096] [2020-10-29 03:31:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:09,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:09,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:09,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:09,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 03:31:09,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:31:09,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-29 03:31:09,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:09,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 03:31:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:31:09,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:09,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:31:09,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:09,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:09,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:09,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056056096] [2020-10-29 03:31:09,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:31:09,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:31:09,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282157102] [2020-10-29 03:31:09,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:31:09,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:31:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:31:09,899 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-29 03:31:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:10,062 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-29 03:31:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:31:10,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-29 03:31:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:10,073 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:31:10,074 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 03:31:10,078 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 [2020-10-29 03:31:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 03:31:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 03:31:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 03:31:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-29 03:31:10,123 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-10-29 03:31:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:10,124 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-29 03:31:10,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:31:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-29 03:31:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 03:31:10,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:10,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:10,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:31:10,126 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash -983817162, now seen corresponding path program 1 times [2020-10-29 03:31:10,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:10,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517293840] [2020-10-29 03:31:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:10,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:10,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:10,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 03:31:10,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:31:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-29 03:31:10,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:10,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:10,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:31:10,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:31:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:31:10,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:10,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:10,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:10,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:10,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:10,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 03:31:10,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:10,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:10,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:10,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:10,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:10,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:31:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517293840] [2020-10-29 03:31:10,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:31:10,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:31:10,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336388390] [2020-10-29 03:31:10,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:31:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:31:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:31:10,728 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-29 03:31:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:10,927 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-29 03:31:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 03:31:10,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 03:31:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:10,929 INFO L225 Difference]: With dead ends: 47 [2020-10-29 03:31:10,929 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:31:10,930 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 [2020-10-29 03:31:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:31:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-29 03:31:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:31:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-29 03:31:10,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-29 03:31:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:10,940 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-29 03:31:10,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:31:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-29 03:31:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:31:10,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:10,942 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] [2020-10-29 03:31:10,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:31:10,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1943183026, now seen corresponding path program 1 times [2020-10-29 03:31:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:10,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181782773] [2020-10-29 03:31:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:11,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:12,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:12,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:31:12,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1138 [2020-10-29 03:31:12,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:12,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:12,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:31:12,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:12,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 03:31:12,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:12,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:12,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:12,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:12,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:31:12,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:12,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:12,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181782773] [2020-10-29 03:31:12,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:12,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:31:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734403016] [2020-10-29 03:31:12,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:31:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:31:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:31:12,564 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 12 states. [2020-10-29 03:31:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:13,161 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-29 03:31:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:31:13,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-29 03:31:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:13,165 INFO L225 Difference]: With dead ends: 50 [2020-10-29 03:31:13,165 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 03:31:13,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:31:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 03:31:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-10-29 03:31:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:31:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-29 03:31:13,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-10-29 03:31:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:13,180 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-29 03:31:13,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:31:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-29 03:31:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 03:31:13,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:13,182 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:13,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:31:13,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash 91661456, now seen corresponding path program 2 times [2020-10-29 03:31:13,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:13,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229819735] [2020-10-29 03:31:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:13,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:13,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:14,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:14,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 03:31:14,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:14,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-29 03:31:14,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:14,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:31:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:31:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:14,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:31:14,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:14,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:14,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229819735] [2020-10-29 03:31:14,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:14,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:31:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736842558] [2020-10-29 03:31:14,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:31:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:31:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:31:14,753 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2020-10-29 03:31:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:15,374 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-29 03:31:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:31:15,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-29 03:31:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:15,383 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:31:15,385 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:31:15,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:31:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:31:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-29 03:31:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:31:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-29 03:31:15,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2020-10-29 03:31:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:15,395 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-29 03:31:15,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:31:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-29 03:31:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:31:15,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:15,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:15,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:31:15,397 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1104106770, now seen corresponding path program 3 times [2020-10-29 03:31:15,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:15,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645676391] [2020-10-29 03:31:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:15,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:15,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:15,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:16,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:16,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:31:16,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:16,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-29 03:31:16,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:16,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:31:16,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:16,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:31:16,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:17,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:17,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:17,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:17,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:17,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:31:17,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:17,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:17,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:17,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645676391] [2020-10-29 03:31:17,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:17,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:31:17,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178022009] [2020-10-29 03:31:17,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:31:17,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:31:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:31:17,351 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 14 states. [2020-10-29 03:31:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:18,027 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-29 03:31:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:31:18,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-29 03:31:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:18,031 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:31:18,031 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:31:18,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:31:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:31:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-29 03:31:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:31:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-29 03:31:18,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2020-10-29 03:31:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:18,045 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-29 03:31:18,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:31:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-29 03:31:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 03:31:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:18,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:18,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:31:18,047 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash 813863372, now seen corresponding path program 4 times [2020-10-29 03:31:18,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:18,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907271877] [2020-10-29 03:31:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:18,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:18,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:19,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:19,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:31:19,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:19,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-29 03:31:19,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:19,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:19,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:31:19,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:19,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:31:19,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:20,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:20,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:20,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:20,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:31:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:20,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:20,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:20,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:31:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:20,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907271877] [2020-10-29 03:31:20,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:20,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:31:20,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136912306] [2020-10-29 03:31:20,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:31:20,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:20,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:31:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:31:20,595 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 17 states. [2020-10-29 03:31:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:21,207 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-29 03:31:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:31:21,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-29 03:31:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:21,210 INFO L225 Difference]: With dead ends: 63 [2020-10-29 03:31:21,211 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:31:21,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:31:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:31:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-10-29 03:31:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:31:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-29 03:31:21,235 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 29 [2020-10-29 03:31:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:21,237 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-29 03:31:21,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:31:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-29 03:31:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:31:21,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:21,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:21,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:31:21,239 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -279156212, now seen corresponding path program 1 times [2020-10-29 03:31:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:21,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869661624] [2020-10-29 03:31:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:21,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:31:21,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:31:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 03:31:21,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:21,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:21,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:21,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:21,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:21,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:21,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:21,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:21,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 03:31:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:21,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:21,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:31:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:21,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:31:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:31:21,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869661624] [2020-10-29 03:31:21,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:21,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 03:31:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62959872] [2020-10-29 03:31:21,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:31:21,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:31:21,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:31:21,770 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-10-29 03:31:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:21,887 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-29 03:31:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:31:21,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-29 03:31:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:21,888 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:31:21,888 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:31:21,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:31:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:31:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-29 03:31:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 03:31:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-29 03:31:21,907 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2020-10-29 03:31:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:21,908 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-29 03:31:21,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:31:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-29 03:31:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:31:21,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:21,912 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:21,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:31:21,914 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1853353656, now seen corresponding path program 5 times [2020-10-29 03:31:21,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:21,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384204345] [2020-10-29 03:31:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:22,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:23,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:23,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:31:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2066 [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:31:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:24,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:24,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:24,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:31:24,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384204345] [2020-10-29 03:31:24,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:24,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:31:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884624283] [2020-10-29 03:31:24,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:31:24,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:31:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:31:24,915 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 16 states. [2020-10-29 03:31:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:25,323 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-29 03:31:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:31:25,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-29 03:31:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:25,325 INFO L225 Difference]: With dead ends: 66 [2020-10-29 03:31:25,325 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:31:25,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:31:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:31:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-29 03:31:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:31:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-29 03:31:25,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 33 [2020-10-29 03:31:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:25,347 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-29 03:31:25,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:31:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-29 03:31:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:31:25,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:25,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:25,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:31:25,352 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash 620755592, now seen corresponding path program 2 times [2020-10-29 03:31:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:25,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364796016] [2020-10-29 03:31:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:25,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:27,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:27,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:31:27,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:31:27,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1801 [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:31:27,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:27,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:27,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:27,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:27,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:27,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:27,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:27,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 03:31:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:27,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:27,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:27,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:27,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:27,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:31:27,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:27,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:31:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:27,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:31:27,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:27,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364796016] [2020-10-29 03:31:27,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:27,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:31:27,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078485591] [2020-10-29 03:31:27,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:31:27,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:27,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:31:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:31:27,636 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 15 states. [2020-10-29 03:31:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:28,094 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-29 03:31:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:31:28,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 03:31:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:28,096 INFO L225 Difference]: With dead ends: 70 [2020-10-29 03:31:28,096 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 03:31:28,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:31:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 03:31:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-29 03:31:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:31:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-29 03:31:28,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 35 [2020-10-29 03:31:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:28,109 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-29 03:31:28,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:31:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-29 03:31:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:31:28,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:28,111 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:28,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:31:28,112 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1952855642, now seen corresponding path program 6 times [2020-10-29 03:31:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:28,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339928864] [2020-10-29 03:31:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:28,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:28,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:30,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:30,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:31:30,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:30,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-29 03:31:30,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:30,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:31:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:31:30,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:31,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:31,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:31,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:31:31,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339928864] [2020-10-29 03:31:31,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:31,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:31:31,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766307693] [2020-10-29 03:31:31,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:31:31,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:31:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:31:31,471 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 17 states. [2020-10-29 03:31:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:31,887 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-10-29 03:31:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:31:31,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-29 03:31:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:31,889 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:31:31,889 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:31:31,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:31:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:31:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-10-29 03:31:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 03:31:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-29 03:31:31,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 35 [2020-10-29 03:31:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:31,903 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-29 03:31:31,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:31:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-29 03:31:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:31:31,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:31,905 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:31,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:31:31,905 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1209983620, now seen corresponding path program 7 times [2020-10-29 03:31:31,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:31,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333992828] [2020-10-29 03:31:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:31,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:34,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2750 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:31:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:31:34,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:35,568 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-29 03:31:35,765 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-29 03:31:36,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:36,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:36,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:36,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:36,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:36,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:36,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:36,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:31:36,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333992828] [2020-10-29 03:31:36,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:36,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:31:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228916569] [2020-10-29 03:31:36,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:31:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:31:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:31:36,302 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 18 states. [2020-10-29 03:31:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:37,631 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-29 03:31:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:31:37,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-29 03:31:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:37,634 INFO L225 Difference]: With dead ends: 89 [2020-10-29 03:31:37,634 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 03:31:37,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:31:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 03:31:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-10-29 03:31:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 03:31:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-29 03:31:37,650 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 37 [2020-10-29 03:31:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:37,650 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-29 03:31:37,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:31:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-29 03:31:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:31:37,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:37,651 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:37,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:31:37,652 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -510073182, now seen corresponding path program 3 times [2020-10-29 03:31:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446731812] [2020-10-29 03:31:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:37,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:37,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:38,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:40,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:40,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:31:40,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:31:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2799 [2020-10-29 03:31:40,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:40,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:31:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:31:40,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:41,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:41,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:41,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:41,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:41,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 03:31:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:41,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:41,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:41,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:41,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 03:31:41,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:41,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:31:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:31:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:31:41,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446731812] [2020-10-29 03:31:41,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:41,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:31:41,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543277051] [2020-10-29 03:31:41,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:31:41,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:41,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:31:41,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:31:41,427 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 18 states. [2020-10-29 03:31:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:42,723 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-29 03:31:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:31:42,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-29 03:31:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:42,725 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:31:42,725 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 03:31:42,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:31:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 03:31:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-10-29 03:31:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:31:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-29 03:31:42,749 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 41 [2020-10-29 03:31:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:42,749 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-29 03:31:42,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:31:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-29 03:31:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:31:42,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:42,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:42,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:31:42,752 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1748209634, now seen corresponding path program 4 times [2020-10-29 03:31:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:42,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743855871] [2020-10-29 03:31:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:42,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:43,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:31:43,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:31:43,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-29 03:31:43,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:43,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:31:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:31:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:31:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:43,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:43,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:43,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:43,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:43,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:31:43,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:43,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:43,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:43,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:43,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:43,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:31:43,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 03:31:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:43,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:43,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:43,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:43,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 03:31:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:43,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:43,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:43,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:31:43,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743855871] [2020-10-29 03:31:43,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:43,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:31:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309756308] [2020-10-29 03:31:43,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:31:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:31:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:31:43,645 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 6 states. [2020-10-29 03:31:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:43,747 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-29 03:31:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:31:43,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 03:31:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:43,749 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:31:43,749 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:31:43,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:31:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:31:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-29 03:31:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 03:31:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-29 03:31:43,771 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 43 [2020-10-29 03:31:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:43,771 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-29 03:31:43,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:31:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-29 03:31:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:31:43,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:43,772 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:43,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:31:43,773 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1814265950, now seen corresponding path program 8 times [2020-10-29 03:31:43,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:43,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18021213] [2020-10-29 03:31:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:43,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:31:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:49,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:49,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:49,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:31:49,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18021213] [2020-10-29 03:31:49,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:49,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:31:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688800986] [2020-10-29 03:31:49,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:31:49,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:31:49,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:31:49,347 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 20 states. [2020-10-29 03:31:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:50,859 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-29 03:31:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:31:50,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-29 03:31:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:50,861 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:31:50,862 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 03:31:50,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:31:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 03:31:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-29 03:31:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:31:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-29 03:31:50,878 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 43 [2020-10-29 03:31:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:50,878 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-29 03:31:50,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:31:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-29 03:31:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:31:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:50,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:50,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:31:50,879 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:50,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1599654306, now seen corresponding path program 5 times [2020-10-29 03:31:50,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:50,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415291698] [2020-10-29 03:31:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:51,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:52,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:53,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:53,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:31:53,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:31:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2680 [2020-10-29 03:31:53,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:53,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:31:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 03:31:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:31:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:54,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:31:54,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:31:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:54,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 03:31:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:54,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:54,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:54,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:31:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:54,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 03:31:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:54,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:54,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:31:54,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:31:54,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:31:54,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:31:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:31:54,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415291698] [2020-10-29 03:31:54,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:31:54,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:31:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709565681] [2020-10-29 03:31:54,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:31:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:31:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:31:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:31:54,378 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 20 states. [2020-10-29 03:31:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:31:55,372 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-10-29 03:31:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:31:55,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-29 03:31:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:31:55,375 INFO L225 Difference]: With dead ends: 102 [2020-10-29 03:31:55,375 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 03:31:55,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:31:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 03:31:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-29 03:31:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 03:31:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-29 03:31:55,391 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 47 [2020-10-29 03:31:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:31:55,392 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-29 03:31:55,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:31:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-29 03:31:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:31:55,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:31:55,393 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:31:55,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:31:55,393 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:31:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:31:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash 756403004, now seen corresponding path program 9 times [2020-10-29 03:31:55,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:31:55,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555160079] [2020-10-29 03:31:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:31:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:31:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:55,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:56,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:31:58,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:31:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:00,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:00,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:00,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:00,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:00,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:00,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:00,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:00,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:00,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:32:00,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555160079] [2020-10-29 03:32:00,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:00,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:32:00,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312413296] [2020-10-29 03:32:00,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:32:00,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:00,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:32:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:32:00,842 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-10-29 03:32:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:02,392 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-29 03:32:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:32:02,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-29 03:32:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:02,396 INFO L225 Difference]: With dead ends: 115 [2020-10-29 03:32:02,396 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 03:32:02,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:32:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 03:32:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2020-10-29 03:32:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 03:32:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-10-29 03:32:02,414 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 45 [2020-10-29 03:32:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:02,414 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-10-29 03:32:02,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:32:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-10-29 03:32:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:32:02,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:02,415 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:02,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:32:02,415 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2057361050, now seen corresponding path program 10 times [2020-10-29 03:32:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98992078] [2020-10-29 03:32:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:02,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3904 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:32:06,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:07,842 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-29 03:32:08,039 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2020-10-29 03:32:08,253 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-10-29 03:32:08,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:32:08,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98992078] [2020-10-29 03:32:08,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:08,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:32:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978189896] [2020-10-29 03:32:08,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:32:08,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:32:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:32:08,632 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 22 states. [2020-10-29 03:32:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:09,164 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-29 03:32:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:32:09,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-29 03:32:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:09,167 INFO L225 Difference]: With dead ends: 117 [2020-10-29 03:32:09,167 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 03:32:09,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:32:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 03:32:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2020-10-29 03:32:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 03:32:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-10-29 03:32:09,184 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 47 [2020-10-29 03:32:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:09,184 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-10-29 03:32:09,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:32:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-10-29 03:32:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:32:09,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:09,185 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:09,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:32:09,185 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash 721204058, now seen corresponding path program 6 times [2020-10-29 03:32:09,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:09,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271484846] [2020-10-29 03:32:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:09,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:09,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:13,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:13,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:32:13,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:32:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4206 [2020-10-29 03:32:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:13,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:32:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 03:32:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:14,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:14,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 03:32:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:14,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:14,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:14,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:14,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:14,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:14,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:32:14,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271484846] [2020-10-29 03:32:14,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:14,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:32:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749174584] [2020-10-29 03:32:14,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:32:14,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:32:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:32:14,813 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 21 states. [2020-10-29 03:32:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:15,566 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2020-10-29 03:32:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:32:15,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-29 03:32:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:15,570 INFO L225 Difference]: With dead ends: 117 [2020-10-29 03:32:15,570 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 03:32:15,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:32:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 03:32:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2020-10-29 03:32:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:32:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-29 03:32:15,591 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 49 [2020-10-29 03:32:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:15,592 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-29 03:32:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:32:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-29 03:32:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:32:15,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:15,593 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:15,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:32:15,593 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1852407176, now seen corresponding path program 11 times [2020-10-29 03:32:15,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:15,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211633089] [2020-10-29 03:32:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4210 [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:32:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:32:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:22,036 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-10-29 03:32:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:22,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:32:22,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211633089] [2020-10-29 03:32:22,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:22,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:32:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653178084] [2020-10-29 03:32:22,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:32:22,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:32:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:32:22,142 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 23 states. [2020-10-29 03:32:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:22,822 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2020-10-29 03:32:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:32:22,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-29 03:32:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:22,824 INFO L225 Difference]: With dead ends: 131 [2020-10-29 03:32:22,824 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 03:32:22,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:32:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 03:32:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-10-29 03:32:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 03:32:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2020-10-29 03:32:22,852 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 49 [2020-10-29 03:32:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:22,852 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2020-10-29 03:32:22,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:32:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2020-10-29 03:32:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:32:22,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:22,853 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:22,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:32:22,854 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -231236744, now seen corresponding path program 7 times [2020-10-29 03:32:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:22,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577390110] [2020-10-29 03:32:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:24,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:26,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:26,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:32:26,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:32:26,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3318 [2020-10-29 03:32:26,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:26,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:32:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:32:26,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:27,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:27,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:27,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:27,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:27,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:27,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 03:32:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:27,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:27,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 03:32:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:27,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:27,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:32:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577390110] [2020-10-29 03:32:27,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:27,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:32:27,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823392372] [2020-10-29 03:32:27,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:32:27,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:32:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:32:27,279 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 23 states. [2020-10-29 03:32:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:28,855 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2020-10-29 03:32:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:32:28,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-29 03:32:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:28,857 INFO L225 Difference]: With dead ends: 132 [2020-10-29 03:32:28,857 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 03:32:28,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 03:32:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 03:32:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2020-10-29 03:32:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 03:32:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2020-10-29 03:32:28,885 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 53 [2020-10-29 03:32:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:28,885 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2020-10-29 03:32:28,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:32:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2020-10-29 03:32:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:32:28,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:28,886 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:28,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:32:28,887 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:28,888 INFO L82 PathProgramCache]: Analyzing trace with hash 61117880, now seen corresponding path program 8 times [2020-10-29 03:32:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878201531] [2020-10-29 03:32:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:29,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:29,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:32:29,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:32:29,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 03:32:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:29,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:29,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 03:32:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:29,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:29,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:29,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 03:32:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:32:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:29,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:32:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:29,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:29,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:29,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-29 03:32:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878201531] [2020-10-29 03:32:29,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:29,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 03:32:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681213153] [2020-10-29 03:32:29,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 03:32:29,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:29,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 03:32:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:32:29,894 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 7 states. [2020-10-29 03:32:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:30,061 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2020-10-29 03:32:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:32:30,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 03:32:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:30,063 INFO L225 Difference]: With dead ends: 181 [2020-10-29 03:32:30,063 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:32:30,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:32:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:32:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-29 03:32:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 03:32:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-29 03:32:30,087 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 55 [2020-10-29 03:32:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:30,087 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-29 03:32:30,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 03:32:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-29 03:32:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:32:30,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:30,089 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:30,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:32:30,089 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1182320076, now seen corresponding path program 9 times [2020-10-29 03:32:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834096510] [2020-10-29 03:32:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:30,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:30,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:33,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:33,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:35,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:35,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:32:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:32:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:36,156 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-29 03:32:36,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:36,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:36,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:32:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:36,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:36,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 2 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:32:36,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834096510] [2020-10-29 03:32:36,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:36,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:32:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361952604] [2020-10-29 03:32:36,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:32:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:32:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:32:36,857 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 23 states. [2020-10-29 03:32:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:38,295 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2020-10-29 03:32:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:32:38,298 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-29 03:32:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:38,300 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:32:38,300 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 03:32:38,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:32:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 03:32:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2020-10-29 03:32:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 03:32:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-29 03:32:38,319 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 55 [2020-10-29 03:32:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:38,319 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-29 03:32:38,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:32:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-29 03:32:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:32:38,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:38,320 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:38,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:32:38,320 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash 539035986, now seen corresponding path program 12 times [2020-10-29 03:32:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:38,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111074095] [2020-10-29 03:32:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:38,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:38,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:41,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 03:32:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 03:32:43,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:44,125 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 19 [2020-10-29 03:32:44,288 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 30 [2020-10-29 03:32:44,491 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-29 03:32:44,683 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2020-10-29 03:32:44,883 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2020-10-29 03:32:45,099 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-10-29 03:32:45,348 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-10-29 03:32:45,608 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-29 03:32:45,912 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2020-10-29 03:32:46,224 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2020-10-29 03:32:46,530 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2020-10-29 03:32:46,842 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-10-29 03:32:47,111 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-10-29 03:32:47,394 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-29 03:32:47,687 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2020-10-29 03:32:47,858 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-10-29 03:32:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:48,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:48,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:32:48,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111074095] [2020-10-29 03:32:48,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:48,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:32:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140679430] [2020-10-29 03:32:48,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:32:48,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:32:48,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:32:48,036 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 25 states. [2020-10-29 03:32:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:50,113 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-10-29 03:32:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:32:50,114 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-29 03:32:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:50,115 INFO L225 Difference]: With dead ends: 129 [2020-10-29 03:32:50,116 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 03:32:50,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=557, Invalid=1249, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 03:32:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 03:32:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-29 03:32:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 03:32:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2020-10-29 03:32:50,133 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 55 [2020-10-29 03:32:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:50,134 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2020-10-29 03:32:50,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:32:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2020-10-29 03:32:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:32:50,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:50,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:50,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:32:50,135 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1257549260, now seen corresponding path program 10 times [2020-10-29 03:32:50,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:50,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446366592] [2020-10-29 03:32:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:51,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:54,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3966 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:32:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 03:32:54,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:55,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:32:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:55,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:32:55,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:55,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:32:55,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:55,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 03:32:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:55,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:55,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 03:32:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:55,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:55,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-29 03:32:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:55,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:55,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:32:55,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:32:55,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:32:55,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:32:55,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:32:55,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:32:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:32:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:32:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:32:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:32:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:32:55,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446366592] [2020-10-29 03:32:55,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:32:55,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:32:55,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270513981] [2020-10-29 03:32:55,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:32:55,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:32:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:32:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:32:55,350 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand 21 states. [2020-10-29 03:32:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:32:56,457 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2020-10-29 03:32:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:32:56,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 03:32:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:32:56,460 INFO L225 Difference]: With dead ends: 123 [2020-10-29 03:32:56,460 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 03:32:56,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:32:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 03:32:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-29 03:32:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 03:32:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-29 03:32:56,480 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 59 [2020-10-29 03:32:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:32:56,481 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-29 03:32:56,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:32:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-29 03:32:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:32:56,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:32:56,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:32:56,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:32:56,482 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:32:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:32:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1743837870, now seen corresponding path program 11 times [2020-10-29 03:32:56,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:32:56,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148280040] [2020-10-29 03:32:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:32:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:32:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:56,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:32:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:00,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:01,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 03:33:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:02,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:02,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 03:33:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:02,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:33:02,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:02,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:33:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:02,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-29 03:33:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:02,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:02,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:33:02,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:33:02,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148280040] [2020-10-29 03:33:02,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:02,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:33:02,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453067730] [2020-10-29 03:33:02,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:33:02,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:33:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:33:02,752 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 23 states. [2020-10-29 03:33:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:03,794 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2020-10-29 03:33:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:33:03,795 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-29 03:33:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:03,797 INFO L225 Difference]: With dead ends: 142 [2020-10-29 03:33:03,797 INFO L226 Difference]: Without dead ends: 138 [2020-10-29 03:33:03,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:33:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-29 03:33:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2020-10-29 03:33:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 03:33:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-10-29 03:33:03,824 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 59 [2020-10-29 03:33:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:03,825 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-10-29 03:33:03,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:33:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-10-29 03:33:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 03:33:03,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:03,826 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:03,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:33:03,826 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash -673913040, now seen corresponding path program 13 times [2020-10-29 03:33:03,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:03,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237593277] [2020-10-29 03:33:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:03,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:07,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 03:33:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:33:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:09,297 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2020-10-29 03:33:09,471 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 20 [2020-10-29 03:33:09,651 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-29 03:33:09,845 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-29 03:33:10,061 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-29 03:33:10,285 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-10-29 03:33:10,520 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2020-10-29 03:33:10,764 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2020-10-29 03:33:10,988 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-29 03:33:11,219 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2020-10-29 03:33:11,493 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2020-10-29 03:33:11,762 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-29 03:33:12,048 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2020-10-29 03:33:12,361 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2020-10-29 03:33:12,675 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2020-10-29 03:33:12,998 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-29 03:33:13,286 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2020-10-29 03:33:13,458 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-10-29 03:33:13,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:13,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:13,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 229 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:33:13,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237593277] [2020-10-29 03:33:13,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:13,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:33:13,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616459356] [2020-10-29 03:33:13,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:33:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:33:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:33:13,654 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 26 states. [2020-10-29 03:33:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:16,030 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2020-10-29 03:33:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:33:16,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-29 03:33:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:16,032 INFO L225 Difference]: With dead ends: 153 [2020-10-29 03:33:16,032 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 03:33:16,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=639, Invalid=1431, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 03:33:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 03:33:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 129. [2020-10-29 03:33:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 03:33:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-10-29 03:33:16,057 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 57 [2020-10-29 03:33:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:16,057 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-10-29 03:33:16,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:33:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-10-29 03:33:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:33:16,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:16,058 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:16,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:33:16,059 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 191821424, now seen corresponding path program 12 times [2020-10-29 03:33:16,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:16,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958253458] [2020-10-29 03:33:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:16,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:21,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:33:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:23,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:23,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:23,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:23,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:23,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:23,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-29 03:33:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:23,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:23,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:33:23,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:33:23,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:33:23,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958253458] [2020-10-29 03:33:23,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:23,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:33:23,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603397991] [2020-10-29 03:33:23,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:33:23,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:33:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:33:23,712 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 25 states. [2020-10-29 03:33:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:24,632 INFO L93 Difference]: Finished difference Result 154 states and 175 transitions. [2020-10-29 03:33:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:33:24,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-29 03:33:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:24,638 INFO L225 Difference]: With dead ends: 154 [2020-10-29 03:33:24,638 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 03:33:24,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:33:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 03:33:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-10-29 03:33:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-29 03:33:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2020-10-29 03:33:24,669 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 59 [2020-10-29 03:33:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:24,669 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2020-10-29 03:33:24,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:33:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2020-10-29 03:33:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:33:24,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:24,670 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:24,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:33:24,671 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1913177486, now seen corresponding path program 14 times [2020-10-29 03:33:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:24,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672314874] [2020-10-29 03:33:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:24,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:24,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:29,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:29,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:33:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:33:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 03:33:29,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:30,518 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2020-10-29 03:33:30,673 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-10-29 03:33:30,887 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2020-10-29 03:33:31,137 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2020-10-29 03:33:31,353 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-10-29 03:33:31,565 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2020-10-29 03:33:31,781 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-29 03:33:32,012 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-10-29 03:33:32,240 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2020-10-29 03:33:32,462 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2020-10-29 03:33:32,693 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2020-10-29 03:33:32,945 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2020-10-29 03:33:33,197 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-29 03:33:33,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:33,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:33,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:33,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:33,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:33,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:33,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:33,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:33,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:33,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:33,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:33:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672314874] [2020-10-29 03:33:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:33:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699152448] [2020-10-29 03:33:33,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:33:33,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:33:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:33:33,684 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand 27 states. [2020-10-29 03:33:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:36,022 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2020-10-29 03:33:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:33:36,023 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-29 03:33:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:36,024 INFO L225 Difference]: With dead ends: 166 [2020-10-29 03:33:36,024 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 03:33:36,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=679, Invalid=1483, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 03:33:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 03:33:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 133. [2020-10-29 03:33:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:33:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2020-10-29 03:33:36,060 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 59 [2020-10-29 03:33:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:36,061 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2020-10-29 03:33:36,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:33:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2020-10-29 03:33:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:33:36,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:36,063 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:36,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:33:36,063 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash -83467378, now seen corresponding path program 13 times [2020-10-29 03:33:36,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:36,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605076494] [2020-10-29 03:33:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:41,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 03:33:41,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:43,108 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-10-29 03:33:43,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:43,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:43,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:33:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:33:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:43,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:33:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-29 03:33:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:43,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:43,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:33:43,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:43,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:33:43,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 4 proven. 122 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:33:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605076494] [2020-10-29 03:33:43,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:43,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:33:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673583080] [2020-10-29 03:33:43,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:33:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:33:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:33:43,743 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand 25 states. [2020-10-29 03:33:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:44,969 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2020-10-29 03:33:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:33:44,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-29 03:33:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:44,971 INFO L225 Difference]: With dead ends: 173 [2020-10-29 03:33:44,971 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 03:33:44,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:33:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 03:33:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2020-10-29 03:33:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:33:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2020-10-29 03:33:44,996 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 63 [2020-10-29 03:33:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:44,997 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2020-10-29 03:33:44,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:33:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2020-10-29 03:33:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:33:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:44,998 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:44,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:33:44,998 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1321108588, now seen corresponding path program 15 times [2020-10-29 03:33:44,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:44,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710934981] [2020-10-29 03:33:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:45,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:33:50,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:33:50,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:51,533 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-10-29 03:33:51,729 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-10-29 03:33:51,929 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-29 03:33:52,147 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-10-29 03:33:52,374 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 32 [2020-10-29 03:33:52,610 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-29 03:33:52,856 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2020-10-29 03:33:53,129 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 30 [2020-10-29 03:33:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:33:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:33:54,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:33:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 293 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:33:54,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710934981] [2020-10-29 03:33:54,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:33:54,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:33:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154501288] [2020-10-29 03:33:54,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:33:54,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:33:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:33:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:33:54,229 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand 29 states. [2020-10-29 03:33:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:33:57,168 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2020-10-29 03:33:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:33:57,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-10-29 03:33:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:33:57,170 INFO L225 Difference]: With dead ends: 169 [2020-10-29 03:33:57,170 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 03:33:57,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=789, Invalid=1967, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:33:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 03:33:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 135. [2020-10-29 03:33:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 03:33:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2020-10-29 03:33:57,203 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 61 [2020-10-29 03:33:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:33:57,203 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2020-10-29 03:33:57,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:33:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2020-10-29 03:33:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:33:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:33:57,204 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:33:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:33:57,204 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:33:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:33:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1852191916, now seen corresponding path program 14 times [2020-10-29 03:33:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:33:57,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879600746] [2020-10-29 03:33:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:33:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:33:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:33:57,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:02,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:02,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:34:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:02,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:02,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:02,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:02,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:02,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:02,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-29 03:34:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:02,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:34:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:02,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 03:34:02,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879600746] [2020-10-29 03:34:02,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:02,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:34:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507317005] [2020-10-29 03:34:02,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:34:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:34:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:34:02,527 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand 18 states. [2020-10-29 03:34:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:02,891 INFO L93 Difference]: Finished difference Result 223 states and 269 transitions. [2020-10-29 03:34:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:34:02,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-29 03:34:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:02,894 INFO L225 Difference]: With dead ends: 223 [2020-10-29 03:34:02,894 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 03:34:02,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:34:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 03:34:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2020-10-29 03:34:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 03:34:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-10-29 03:34:02,910 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 63 [2020-10-29 03:34:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:02,910 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-10-29 03:34:02,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:34:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-10-29 03:34:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:34:02,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:02,911 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:02,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:34:02,911 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1246113940, now seen corresponding path program 16 times [2020-10-29 03:34:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:02,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075136508] [2020-10-29 03:34:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:02,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:03,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:07,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:34:07,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:08,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:08,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 03:34:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075136508] [2020-10-29 03:34:08,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:08,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:34:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863407704] [2020-10-29 03:34:08,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:34:08,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:34:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:34:08,280 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 19 states. [2020-10-29 03:34:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:08,627 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-29 03:34:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:34:08,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-29 03:34:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:08,629 INFO L225 Difference]: With dead ends: 159 [2020-10-29 03:34:08,629 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 03:34:08,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:34:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 03:34:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-29 03:34:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 03:34:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-29 03:34:08,651 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2020-10-29 03:34:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:08,651 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-29 03:34:08,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:34:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-29 03:34:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 03:34:08,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:08,652 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:08,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:34:08,653 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1897396686, now seen corresponding path program 17 times [2020-10-29 03:34:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:08,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927194758] [2020-10-29 03:34:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:13,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:13,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 03:34:13,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:34:13,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:13,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:34:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:34:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:14,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:14,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:14,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:14,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:14,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 03:34:14,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927194758] [2020-10-29 03:34:14,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:14,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:34:14,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022292211] [2020-10-29 03:34:14,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:34:14,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:34:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:34:14,013 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 20 states. [2020-10-29 03:34:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:14,334 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2020-10-29 03:34:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:34:14,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-29 03:34:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:14,336 INFO L225 Difference]: With dead ends: 161 [2020-10-29 03:34:14,337 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:34:14,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:34:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:34:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-29 03:34:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 03:34:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-29 03:34:14,354 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 87 [2020-10-29 03:34:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:14,355 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-29 03:34:14,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:34:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-29 03:34:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 03:34:14,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:14,356 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:14,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:34:14,356 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash 845868112, now seen corresponding path program 18 times [2020-10-29 03:34:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:14,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215703155] [2020-10-29 03:34:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:14,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:14,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:14,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:19,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:34:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:19,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:19,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:19,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 03:34:19,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215703155] [2020-10-29 03:34:19,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:19,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:34:19,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658336880] [2020-10-29 03:34:19,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:34:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:34:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:34:19,737 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 21 states. [2020-10-29 03:34:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:20,052 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2020-10-29 03:34:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:34:20,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-29 03:34:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:20,054 INFO L225 Difference]: With dead ends: 157 [2020-10-29 03:34:20,054 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 03:34:20,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:34:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 03:34:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-29 03:34:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 03:34:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-29 03:34:20,070 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 89 [2020-10-29 03:34:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:20,071 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-29 03:34:20,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:34:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-29 03:34:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 03:34:20,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:20,072 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:20,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:34:20,072 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 13419246, now seen corresponding path program 19 times [2020-10-29 03:34:20,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:20,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347821951] [2020-10-29 03:34:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:25,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:34:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:25,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:25,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 03:34:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347821951] [2020-10-29 03:34:25,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:25,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:34:25,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930780018] [2020-10-29 03:34:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:34:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:34:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:34:25,518 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 22 states. [2020-10-29 03:34:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:25,940 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-29 03:34:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:34:25,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-10-29 03:34:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:25,942 INFO L225 Difference]: With dead ends: 154 [2020-10-29 03:34:25,942 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:34:25,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:34:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:34:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-29 03:34:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 03:34:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-29 03:34:25,957 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 91 [2020-10-29 03:34:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:25,957 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-29 03:34:25,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:34:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-29 03:34:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 03:34:25,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:25,959 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:25,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 03:34:25,959 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1028521622, now seen corresponding path program 20 times [2020-10-29 03:34:25,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:25,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638234595] [2020-10-29 03:34:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:25,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:30,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:34:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:31,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:31,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:31,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:31,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:31,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:31,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:31,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-29 03:34:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638234595] [2020-10-29 03:34:31,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:31,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:34:31,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446423978] [2020-10-29 03:34:31,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:34:31,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:34:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:34:31,464 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 23 states. [2020-10-29 03:34:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:31,877 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-10-29 03:34:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:34:31,878 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-29 03:34:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:31,880 INFO L225 Difference]: With dead ends: 160 [2020-10-29 03:34:31,880 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:34:31,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:34:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:34:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-29 03:34:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 03:34:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-29 03:34:31,897 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 95 [2020-10-29 03:34:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:31,897 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-29 03:34:31,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:34:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-29 03:34:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 03:34:31,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:31,898 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:31,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 03:34:31,899 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:31,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1368354330, now seen corresponding path program 21 times [2020-10-29 03:34:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366402679] [2020-10-29 03:34:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:31,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:32,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 03:34:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:34:36,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:37,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:37,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:37,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:37,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-29 03:34:37,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366402679] [2020-10-29 03:34:37,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:37,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:34:37,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961044370] [2020-10-29 03:34:37,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:34:37,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:34:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:34:37,465 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 24 states. [2020-10-29 03:34:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:37,954 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-10-29 03:34:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:34:37,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-29 03:34:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:37,956 INFO L225 Difference]: With dead ends: 166 [2020-10-29 03:34:37,956 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 03:34:37,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:34:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 03:34:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-29 03:34:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 03:34:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-29 03:34:37,975 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 99 [2020-10-29 03:34:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:37,976 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-29 03:34:37,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:34:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-29 03:34:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 03:34:37,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:37,977 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:37,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 03:34:37,977 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash 294876258, now seen corresponding path program 22 times [2020-10-29 03:34:37,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:37,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191098096] [2020-10-29 03:34:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:38,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:42,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:42,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 03:34:42,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:42,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:34:42,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:42,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:34:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:34:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:34:42,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:43,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:43,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:43,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:43,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:43,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-29 03:34:43,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191098096] [2020-10-29 03:34:43,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:43,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:34:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349021512] [2020-10-29 03:34:43,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:34:43,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:34:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:34:43,551 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 25 states. [2020-10-29 03:34:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:43,966 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2020-10-29 03:34:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:34:43,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-29 03:34:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:43,968 INFO L225 Difference]: With dead ends: 172 [2020-10-29 03:34:43,968 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 03:34:43,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:34:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 03:34:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-29 03:34:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 03:34:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-29 03:34:43,986 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 103 [2020-10-29 03:34:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:43,986 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-29 03:34:43,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:34:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-29 03:34:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 03:34:43,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:43,988 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:43,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 03:34:43,988 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash -349853474, now seen corresponding path program 23 times [2020-10-29 03:34:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:43,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846361915] [2020-10-29 03:34:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:44,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:49,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:49,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 03:34:49,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:34:49,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:34:49,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:49,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:49,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:49,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:49,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:49,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-29 03:34:49,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846361915] [2020-10-29 03:34:49,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:49,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:34:49,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511065739] [2020-10-29 03:34:49,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:34:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:34:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:34:49,633 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 26 states. [2020-10-29 03:34:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:50,083 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2020-10-29 03:34:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:34:50,085 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-29 03:34:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:50,086 INFO L225 Difference]: With dead ends: 178 [2020-10-29 03:34:50,086 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 03:34:50,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:34:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 03:34:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-29 03:34:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 03:34:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-29 03:34:50,099 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2020-10-29 03:34:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:50,100 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-29 03:34:50,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:34:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-29 03:34:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:34:50,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:50,101 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:50,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 03:34:50,101 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:50,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1806839642, now seen corresponding path program 24 times [2020-10-29 03:34:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:50,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279991702] [2020-10-29 03:34:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking...