/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=SHALLOWEST --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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:14:45,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:14:45,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:14:45,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:14:45,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:14:45,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:14:45,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:14:45,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:14:45,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:14:45,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:14:45,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:14:45,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:14:45,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:14:45,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:14:45,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:14:45,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:14:45,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:14:45,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:14:45,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:14:45,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:14:45,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:14:45,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:14:45,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:14:45,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:14:45,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:14:45,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:14:45,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:14:45,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:14:45,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:14:45,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:14:45,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:14:45,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:14:45,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:14:45,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:14:45,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:14:45,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:14:45,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:14:45,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:14:45,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:14:45,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:14:45,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:14:45,559 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 [2020-10-27 05:14:45,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:14:45,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:14:45,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:14:45,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:14:45,606 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:14:45,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:14:45,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:14:45,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:14:45,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:14:45,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:14:45,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:14:45,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:14:45,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:14:45,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:14:45,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:14:45,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:14:45,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:14:45,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:14:45,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:14:45,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:14:45,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:14:45,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:14:45,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:14:45,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:14:45,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:14:45,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:14:45,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:14:45,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:14:45,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:14:45,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:14:45,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:14:46,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:14:46,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:14:46,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:14:46,051 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:14:46,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:14:46,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc8a8ce3/335eab18c8f14308a81cf62c5446dd3e/FLAG4d3dd2de8 [2020-10-27 05:14:46,900 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:14:46,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:14:46,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc8a8ce3/335eab18c8f14308a81cf62c5446dd3e/FLAG4d3dd2de8 [2020-10-27 05:14:47,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc8a8ce3/335eab18c8f14308a81cf62c5446dd3e [2020-10-27 05:14:47,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:14:47,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:14:47,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:14:47,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:14:47,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:14:47,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb114ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47, skipping insertion in model container [2020-10-27 05:14:47,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:14:47,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:14:47,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:14:47,641 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:14:47,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:14:47,859 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:14:47,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47 WrapperNode [2020-10-27 05:14:47,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:14:47,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:14:47,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:14:47,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:14:47,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (1/1) ... [2020-10-27 05:14:47,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:14:47,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:14:47,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:14:47,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:14:47,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (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 [2020-10-27 05:14:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:14:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:14:48,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:14:48,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:14:48,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:14:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:14:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:14:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:14:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:14:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:14:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:14:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:14:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:14:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:14:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:14:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:14:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:14:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:14:49,207 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:14:49,208 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:14:49,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:14:49 BoogieIcfgContainer [2020-10-27 05:14:49,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:14:49,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:14:49,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:14:49,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:14:49,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:14:47" (1/3) ... [2020-10-27 05:14:49,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f08e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:14:49, skipping insertion in model container [2020-10-27 05:14:49,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:14:47" (2/3) ... [2020-10-27 05:14:49,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f08e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:14:49, skipping insertion in model container [2020-10-27 05:14:49,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:14:49" (3/3) ... [2020-10-27 05:14:49,223 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:14:49,236 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:14:49,251 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:14:49,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:14:49,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:14:49,295 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:14:49,295 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:14:49,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:14:49,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:14:49,295 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:14:49,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:14:49,296 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:14:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-27 05:14:49,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:14:49,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:49,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:49,328 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash 350764180, now seen corresponding path program 1 times [2020-10-27 05:14:49,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:49,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401951771] [2020-10-27 05:14:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:51,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:51,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:54,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:14:54,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:14:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:14:54,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:14:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:14:55,349 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:55,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:55,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:55,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:14:55,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:55,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401951771] [2020-10-27 05:14:55,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:55,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456987202] [2020-10-27 05:14:55,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:55,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:55,466 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 6 states. [2020-10-27 05:14:55,969 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:57,061 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:57,377 INFO L93 Difference]: Finished difference Result 286 states and 463 transitions. [2020-10-27 05:14:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:14:57,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 05:14:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:57,395 INFO L225 Difference]: With dead ends: 286 [2020-10-27 05:14:57,396 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 05:14:57,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 05:14:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-10-27 05:14:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 05:14:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2020-10-27 05:14:57,492 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 66 [2020-10-27 05:14:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:57,492 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2020-10-27 05:14:57,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2020-10-27 05:14:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:14:57,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:57,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:57,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:14:57,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 816375659, now seen corresponding path program 1 times [2020-10-27 05:14:57,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:57,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733609842] [2020-10-27 05:14:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:02,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:15:02,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:15:02,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 05:15:02,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:15:02,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:02,861 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:02,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:02,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:02,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:15:02,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733609842] [2020-10-27 05:15:02,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:02,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:02,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600588904] [2020-10-27 05:15:02,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:02,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:02,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:02,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:02,933 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand 6 states. [2020-10-27 05:15:03,198 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:03,791 INFO L93 Difference]: Finished difference Result 323 states and 475 transitions. [2020-10-27 05:15:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:15:03,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 05:15:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:03,795 INFO L225 Difference]: With dead ends: 323 [2020-10-27 05:15:03,795 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 05:15:03,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:15:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 05:15:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-27 05:15:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 05:15:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 254 transitions. [2020-10-27 05:15:03,822 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 254 transitions. Word has length 67 [2020-10-27 05:15:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:03,822 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 254 transitions. [2020-10-27 05:15:03,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 254 transitions. [2020-10-27 05:15:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:15:03,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:03,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:03,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:15:03,825 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1604381819, now seen corresponding path program 1 times [2020-10-27 05:15:03,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:03,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114034007] [2020-10-27 05:15:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:03,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:03,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:04,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:08,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:08,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:15:08,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:08,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:15:08,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:15:08,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:09,244 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:09,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:09,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:09,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:09,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:09,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:15:09,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:09,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:09,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:09,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114034007] [2020-10-27 05:15:09,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:09,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:15:09,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637281665] [2020-10-27 05:15:09,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:09,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:09,319 INFO L87 Difference]: Start difference. First operand 180 states and 254 transitions. Second operand 11 states. [2020-10-27 05:15:09,607 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:15:10,637 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:15:10,870 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:15:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:11,434 INFO L93 Difference]: Finished difference Result 339 states and 498 transitions. [2020-10-27 05:15:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:15:11,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-27 05:15:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:11,439 INFO L225 Difference]: With dead ends: 339 [2020-10-27 05:15:11,440 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 05:15:11,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:15:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 05:15:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 180. [2020-10-27 05:15:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 05:15:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 252 transitions. [2020-10-27 05:15:11,488 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 252 transitions. Word has length 68 [2020-10-27 05:15:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:11,488 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 252 transitions. [2020-10-27 05:15:11,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:15:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 252 transitions. [2020-10-27 05:15:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:15:11,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:11,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2020-10-27 05:15:11,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:15:11,493 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash -424659620, now seen corresponding path program 1 times [2020-10-27 05:15:11,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:11,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862346441] [2020-10-27 05:15:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:11,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:16,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:16,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:15:16,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:15:16,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:15:16,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:15:16,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:15:16,782 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:16,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:16,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:15:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:16,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862346441] [2020-10-27 05:15:16,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:16,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455192406] [2020-10-27 05:15:16,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:16,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:16,838 INFO L87 Difference]: Start difference. First operand 180 states and 252 transitions. Second operand 6 states. [2020-10-27 05:15:17,084 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:17,623 INFO L93 Difference]: Finished difference Result 315 states and 457 transitions. [2020-10-27 05:15:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:15:17,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:15:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:17,625 INFO L225 Difference]: With dead ends: 315 [2020-10-27 05:15:17,626 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 05:15:17,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:15:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 05:15:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-27 05:15:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 05:15:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 249 transitions. [2020-10-27 05:15:17,652 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 249 transitions. Word has length 69 [2020-10-27 05:15:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:17,652 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 249 transitions. [2020-10-27 05:15:17,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 249 transitions. [2020-10-27 05:15:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:15:17,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:17,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:17,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:15:17,654 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 212899544, now seen corresponding path program 1 times [2020-10-27 05:15:17,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:17,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662242742] [2020-10-27 05:15:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:17,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:17,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:22,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:15:22,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:22,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:15:22,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:15:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:15:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:23,134 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:23,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:23,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:23,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662242742] [2020-10-27 05:15:23,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:23,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:15:23,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813512671] [2020-10-27 05:15:23,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:15:23,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:15:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:15:23,205 INFO L87 Difference]: Start difference. First operand 180 states and 249 transitions. Second operand 10 states. [2020-10-27 05:15:23,483 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:15:24,265 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:15:24,567 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:15:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:25,109 INFO L93 Difference]: Finished difference Result 408 states and 597 transitions. [2020-10-27 05:15:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:15:25,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 05:15:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:25,112 INFO L225 Difference]: With dead ends: 408 [2020-10-27 05:15:25,112 INFO L226 Difference]: Without dead ends: 284 [2020-10-27 05:15:25,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:15:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-27 05:15:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 180. [2020-10-27 05:15:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 05:15:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 248 transitions. [2020-10-27 05:15:25,146 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 248 transitions. Word has length 70 [2020-10-27 05:15:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:25,146 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 248 transitions. [2020-10-27 05:15:25,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:15:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 248 transitions. [2020-10-27 05:15:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:15:25,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:25,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:25,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:15:25,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1246941107, now seen corresponding path program 1 times [2020-10-27 05:15:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:25,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146369018] [2020-10-27 05:15:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:30,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:30,485 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:30,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:30,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:30,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:30,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:30,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:15:30,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:30,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146369018] [2020-10-27 05:15:30,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:30,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:30,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327988001] [2020-10-27 05:15:30,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:30,553 INFO L87 Difference]: Start difference. First operand 180 states and 248 transitions. Second operand 6 states. [2020-10-27 05:15:30,864 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:31,438 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:15:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:31,746 INFO L93 Difference]: Finished difference Result 451 states and 651 transitions. [2020-10-27 05:15:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:15:31,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:15:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:31,749 INFO L225 Difference]: With dead ends: 451 [2020-10-27 05:15:31,749 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 05:15:31,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:15:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 05:15:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2020-10-27 05:15:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 05:15:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 432 transitions. [2020-10-27 05:15:31,798 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 432 transitions. Word has length 71 [2020-10-27 05:15:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:31,798 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 432 transitions. [2020-10-27 05:15:31,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 432 transitions. [2020-10-27 05:15:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:15:31,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:31,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:31,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:15:31,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -886883044, now seen corresponding path program 1 times [2020-10-27 05:15:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549836780] [2020-10-27 05:15:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:31,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:31,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:32,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:36,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:15:36,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:15:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:15:36,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:15:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:37,222 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:37,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:37,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:37,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:37,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:37,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549836780] [2020-10-27 05:15:37,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:37,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:15:37,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914461257] [2020-10-27 05:15:37,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:37,284 INFO L87 Difference]: Start difference. First operand 301 states and 432 transitions. Second operand 11 states. [2020-10-27 05:15:37,655 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:15:38,577 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:15:38,829 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:15:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:39,261 INFO L93 Difference]: Finished difference Result 757 states and 1124 transitions. [2020-10-27 05:15:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:15:39,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:15:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:39,266 INFO L225 Difference]: With dead ends: 757 [2020-10-27 05:15:39,267 INFO L226 Difference]: Without dead ends: 544 [2020-10-27 05:15:39,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:15:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-27 05:15:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 301. [2020-10-27 05:15:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 05:15:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 430 transitions. [2020-10-27 05:15:39,317 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 430 transitions. Word has length 72 [2020-10-27 05:15:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:39,318 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 430 transitions. [2020-10-27 05:15:39,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:15:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 430 transitions. [2020-10-27 05:15:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:15:39,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:39,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:39,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:15:39,319 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1859978031, now seen corresponding path program 1 times [2020-10-27 05:15:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538475094] [2020-10-27 05:15:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:44,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:15:44,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:44,855 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:44,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:44,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:44,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:44,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:44,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538475094] [2020-10-27 05:15:44,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:44,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:15:44,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397921395] [2020-10-27 05:15:44,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:15:44,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:15:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:15:44,924 INFO L87 Difference]: Start difference. First operand 301 states and 430 transitions. Second operand 12 states. [2020-10-27 05:15:45,216 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:15:46,648 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:15:46,931 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:15:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:48,569 INFO L93 Difference]: Finished difference Result 1138 states and 1680 transitions. [2020-10-27 05:15:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:15:48,569 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-27 05:15:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:48,576 INFO L225 Difference]: With dead ends: 1138 [2020-10-27 05:15:48,576 INFO L226 Difference]: Without dead ends: 920 [2020-10-27 05:15:48,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:15:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-10-27 05:15:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 301. [2020-10-27 05:15:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 05:15:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-10-27 05:15:48,635 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 73 [2020-10-27 05:15:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:48,635 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-10-27 05:15:48,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:15:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-10-27 05:15:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:15:48,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:48,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2020-10-27 05:15:48,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:15:48,637 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 867090822, now seen corresponding path program 1 times [2020-10-27 05:15:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:48,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059918451] [2020-10-27 05:15:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4851 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:15:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:15:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:53,976 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-27 05:15:54,102 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-27 05:15:54,376 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-27 05:15:54,518 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 05:15:54,708 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 05:15:55,697 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:15:55,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:55,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:55,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:55,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059918451] [2020-10-27 05:15:55,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:55,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-27 05:15:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273349993] [2020-10-27 05:15:55,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 05:15:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 05:15:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:15:55,770 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 23 states. [2020-10-27 05:15:55,997 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 05:15:56,583 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:15:57,351 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:15:57,691 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-27 05:15:58,083 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-27 05:15:58,544 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 111 [2020-10-27 05:15:59,197 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 131 [2020-10-27 05:15:59,593 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:15:59,794 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 05:15:59,942 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:16:00,339 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:16:02,512 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:16:02,802 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:16:03,435 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:16:03,767 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:16:04,285 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:16:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:08,726 INFO L93 Difference]: Finished difference Result 2014 states and 3046 transitions. [2020-10-27 05:16:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 05:16:08,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-27 05:16:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:08,742 INFO L225 Difference]: With dead ends: 2014 [2020-10-27 05:16:08,742 INFO L226 Difference]: Without dead ends: 1811 [2020-10-27 05:16:08,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 05:16:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2020-10-27 05:16:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 321. [2020-10-27 05:16:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-27 05:16:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 453 transitions. [2020-10-27 05:16:08,825 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 453 transitions. Word has length 74 [2020-10-27 05:16:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:08,826 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 453 transitions. [2020-10-27 05:16:08,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 05:16:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 453 transitions. [2020-10-27 05:16:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:16:08,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:08,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2020-10-27 05:16:08,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:16:08,827 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1850410801, now seen corresponding path program 1 times [2020-10-27 05:16:08,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:08,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270087827] [2020-10-27 05:16:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:08,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:08,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:09,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:12,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:12,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:16:12,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:12,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3631 [2020-10-27 05:16:12,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:16:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:16:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:12,994 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:12,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:13,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:13,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:13,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:13,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:16:13,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:13,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:16:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270087827] [2020-10-27 05:16:13,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:13,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:16:13,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955770263] [2020-10-27 05:16:13,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:16:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:16:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:13,079 INFO L87 Difference]: Start difference. First operand 321 states and 453 transitions. Second operand 11 states. [2020-10-27 05:16:13,399 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:16:14,514 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:16:14,769 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:16:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:15,519 INFO L93 Difference]: Finished difference Result 666 states and 972 transitions. [2020-10-27 05:16:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:16:15,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-27 05:16:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:15,523 INFO L225 Difference]: With dead ends: 666 [2020-10-27 05:16:15,523 INFO L226 Difference]: Without dead ends: 448 [2020-10-27 05:16:15,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:16:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-27 05:16:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 321. [2020-10-27 05:16:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-27 05:16:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 452 transitions. [2020-10-27 05:16:15,589 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 452 transitions. Word has length 74 [2020-10-27 05:16:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:15,589 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 452 transitions. [2020-10-27 05:16:15,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:16:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 452 transitions. [2020-10-27 05:16:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:16:15,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:15,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1] [2020-10-27 05:16:15,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:16:15,591 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash 490066758, now seen corresponding path program 1 times [2020-10-27 05:16:15,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:15,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327087643] [2020-10-27 05:16:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:15,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:15,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:16:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:16:16,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:16,346 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:16,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:16,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:16,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:16,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:16,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:16:16,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:16,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327087643] [2020-10-27 05:16:16,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:16,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:16:16,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810065272] [2020-10-27 05:16:16,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:16,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:16,383 INFO L87 Difference]: Start difference. First operand 321 states and 452 transitions. Second operand 7 states. [2020-10-27 05:16:16,655 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:16:17,384 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:17,666 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:16:17,908 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:16:18,303 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:18,578 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:16:18,847 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:19,823 INFO L93 Difference]: Finished difference Result 2001 states and 3024 transitions. [2020-10-27 05:16:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:16:19,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-27 05:16:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:19,831 INFO L225 Difference]: With dead ends: 2001 [2020-10-27 05:16:19,832 INFO L226 Difference]: Without dead ends: 1800 [2020-10-27 05:16:19,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:16:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-10-27 05:16:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 563. [2020-10-27 05:16:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-27 05:16:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 810 transitions. [2020-10-27 05:16:19,966 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 810 transitions. Word has length 75 [2020-10-27 05:16:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:19,966 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 810 transitions. [2020-10-27 05:16:19,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 810 transitions. [2020-10-27 05:16:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:16:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:19,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1] [2020-10-27 05:16:19,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:16:19,968 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:19,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1388155142, now seen corresponding path program 1 times [2020-10-27 05:16:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:19,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936927565] [2020-10-27 05:16:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:20,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:20,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:24,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:24,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:16:24,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:16:24,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:25,660 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-27 05:16:25,930 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 05:16:26,183 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-27 05:16:26,669 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-27 05:16:27,439 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:27,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:27,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:27,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:27,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:16:27,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:27,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936927565] [2020-10-27 05:16:27,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:27,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-27 05:16:27,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946258405] [2020-10-27 05:16:27,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 05:16:27,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 05:16:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:16:27,504 INFO L87 Difference]: Start difference. First operand 563 states and 810 transitions. Second operand 23 states. [2020-10-27 05:16:27,808 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 05:16:28,755 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 207 [2020-10-27 05:16:29,365 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:16:29,648 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 05:16:30,055 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-27 05:16:30,459 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-27 05:16:31,023 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2020-10-27 05:16:31,589 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-10-27 05:16:32,433 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 158 [2020-10-27 05:16:32,663 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 05:16:32,928 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 05:16:33,188 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 05:16:33,424 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 05:16:33,636 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 05:16:33,851 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 05:16:35,866 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:16:36,220 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:16:36,735 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:16:37,111 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:16:37,699 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 05:16:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:42,699 INFO L93 Difference]: Finished difference Result 4223 states and 6388 transitions. [2020-10-27 05:16:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 05:16:42,700 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-27 05:16:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:42,718 INFO L225 Difference]: With dead ends: 4223 [2020-10-27 05:16:42,718 INFO L226 Difference]: Without dead ends: 3822 [2020-10-27 05:16:42,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=381, Invalid=2169, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 05:16:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2020-10-27 05:16:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 563. [2020-10-27 05:16:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-27 05:16:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 810 transitions. [2020-10-27 05:16:42,903 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 810 transitions. Word has length 75 [2020-10-27 05:16:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:42,903 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 810 transitions. [2020-10-27 05:16:42,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 05:16:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 810 transitions. [2020-10-27 05:16:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:16:42,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:42,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1] [2020-10-27 05:16:42,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:16:42,906 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1009519621, now seen corresponding path program 1 times [2020-10-27 05:16:42,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392923865] [2020-10-27 05:16:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:42,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3476 [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:16:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:16:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:16:46,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:46,972 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:46,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:46,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:46,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:46,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:16:46,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:46,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392923865] [2020-10-27 05:16:47,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:47,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:16:47,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221186456] [2020-10-27 05:16:47,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:16:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:16:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:16:47,006 INFO L87 Difference]: Start difference. First operand 563 states and 810 transitions. Second operand 10 states. [2020-10-27 05:16:47,339 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:16:48,419 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:16:48,693 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:16:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:49,387 INFO L93 Difference]: Finished difference Result 1416 states and 2101 transitions. [2020-10-27 05:16:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:16:49,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:16:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:49,398 INFO L225 Difference]: With dead ends: 1416 [2020-10-27 05:16:49,398 INFO L226 Difference]: Without dead ends: 1000 [2020-10-27 05:16:49,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:16:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2020-10-27 05:16:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 556. [2020-10-27 05:16:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-27 05:16:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 797 transitions. [2020-10-27 05:16:49,552 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 797 transitions. Word has length 76 [2020-10-27 05:16:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:49,552 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 797 transitions. [2020-10-27 05:16:49,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:16:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 797 transitions. [2020-10-27 05:16:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:16:49,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:49,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1] [2020-10-27 05:16:49,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:16:49,554 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1232060233, now seen corresponding path program 1 times [2020-10-27 05:16:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403490032] [2020-10-27 05:16:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:49,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:49,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:51,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:16:51,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:16:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2354 [2020-10-27 05:16:51,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:16:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:16:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:16:51,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:52,319 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2020-10-27 05:16:52,676 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:52,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:52,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:52,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:52,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:52,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:16:52,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:52,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403490032] [2020-10-27 05:16:52,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:52,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:16:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184054555] [2020-10-27 05:16:52,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:16:52,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:16:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:16:52,731 INFO L87 Difference]: Start difference. First operand 556 states and 797 transitions. Second operand 10 states. [2020-10-27 05:16:53,055 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:16:54,042 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:16:54,290 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:16:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:54,756 INFO L93 Difference]: Finished difference Result 1162 states and 1719 transitions. [2020-10-27 05:16:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:16:54,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:16:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:54,760 INFO L225 Difference]: With dead ends: 1162 [2020-10-27 05:16:54,760 INFO L226 Difference]: Without dead ends: 759 [2020-10-27 05:16:54,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:16:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2020-10-27 05:16:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 554. [2020-10-27 05:16:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-27 05:16:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 787 transitions. [2020-10-27 05:16:54,926 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 787 transitions. Word has length 76 [2020-10-27 05:16:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:54,927 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 787 transitions. [2020-10-27 05:16:54,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:16:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 787 transitions. [2020-10-27 05:16:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:16:54,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:54,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1] [2020-10-27 05:16:54,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:16:54,928 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1630043035, now seen corresponding path program 1 times [2020-10-27 05:16:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:54,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838116707] [2020-10-27 05:16:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:54,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:54,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:59,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:59,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:16:59,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:16:59,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4428 [2020-10-27 05:16:59,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:16:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:16:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:16:59,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:59,667 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2020-10-27 05:16:59,934 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:59,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:59,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:59,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:16:59,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:59,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838116707] [2020-10-27 05:16:59,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:59,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:16:59,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174056376] [2020-10-27 05:16:59,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:16:59,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:59,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:16:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:16:59,980 INFO L87 Difference]: Start difference. First operand 554 states and 787 transitions. Second operand 10 states. [2020-10-27 05:17:00,265 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:01,482 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:01,752 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:02,233 INFO L93 Difference]: Finished difference Result 1179 states and 1730 transitions. [2020-10-27 05:17:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:17:02,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:17:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:02,236 INFO L225 Difference]: With dead ends: 1179 [2020-10-27 05:17:02,237 INFO L226 Difference]: Without dead ends: 738 [2020-10-27 05:17:02,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:17:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-27 05:17:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 537. [2020-10-27 05:17:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 05:17:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 764 transitions. [2020-10-27 05:17:02,453 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 764 transitions. Word has length 76 [2020-10-27 05:17:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:02,454 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 764 transitions. [2020-10-27 05:17:02,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:17:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 764 transitions. [2020-10-27 05:17:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:17:02,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:02,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1] [2020-10-27 05:17:02,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:17:02,456 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash -536808506, now seen corresponding path program 1 times [2020-10-27 05:17:02,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:02,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833626685] [2020-10-27 05:17:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:02,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:03,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3366 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:17:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:06,260 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:06,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:06,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:06,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833626685] [2020-10-27 05:17:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:06,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:17:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226865849] [2020-10-27 05:17:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:17:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:17:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:06,291 INFO L87 Difference]: Start difference. First operand 537 states and 764 transitions. Second operand 9 states. [2020-10-27 05:17:06,561 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:07,435 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:08,273 INFO L93 Difference]: Finished difference Result 1339 states and 1988 transitions. [2020-10-27 05:17:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:17:08,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-10-27 05:17:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:08,277 INFO L225 Difference]: With dead ends: 1339 [2020-10-27 05:17:08,277 INFO L226 Difference]: Without dead ends: 910 [2020-10-27 05:17:08,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:17:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-10-27 05:17:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 507. [2020-10-27 05:17:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-27 05:17:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 728 transitions. [2020-10-27 05:17:08,475 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 728 transitions. Word has length 76 [2020-10-27 05:17:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:08,476 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 728 transitions. [2020-10-27 05:17:08,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:17:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 728 transitions. [2020-10-27 05:17:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:17:08,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:08,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1] [2020-10-27 05:17:08,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:17:08,477 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:08,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:08,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1772942771, now seen corresponding path program 1 times [2020-10-27 05:17:08,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:08,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717678249] [2020-10-27 05:17:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:08,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:08,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:17:08,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:09,145 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:09,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:09,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:09,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:09,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:09,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:09,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:17:09,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:09,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:09,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717678249] [2020-10-27 05:17:09,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:09,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:17:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464456284] [2020-10-27 05:17:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:17:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:17:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:17:09,189 INFO L87 Difference]: Start difference. First operand 507 states and 728 transitions. Second operand 7 states. [2020-10-27 05:17:09,530 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:17:10,719 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:17:11,009 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:11,297 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:11,693 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:12,001 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:12,298 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:12,570 INFO L93 Difference]: Finished difference Result 2115 states and 3176 transitions. [2020-10-27 05:17:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:17:12,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-27 05:17:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:12,579 INFO L225 Difference]: With dead ends: 2115 [2020-10-27 05:17:12,579 INFO L226 Difference]: Without dead ends: 1716 [2020-10-27 05:17:12,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:17:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-10-27 05:17:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 507. [2020-10-27 05:17:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-27 05:17:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 724 transitions. [2020-10-27 05:17:12,752 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 724 transitions. Word has length 77 [2020-10-27 05:17:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:12,752 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 724 transitions. [2020-10-27 05:17:12,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:17:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 724 transitions. [2020-10-27 05:17:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:17:12,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:12,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1] [2020-10-27 05:17:12,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:17:12,753 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1496587340, now seen corresponding path program 1 times [2020-10-27 05:17:12,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:12,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143982554] [2020-10-27 05:17:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:12,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:17:13,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:13,302 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:13,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:13,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:13,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:17:13,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:13,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143982554] [2020-10-27 05:17:13,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:13,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760825608] [2020-10-27 05:17:13,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:17:13,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:17:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:13,333 INFO L87 Difference]: Start difference. First operand 507 states and 724 transitions. Second operand 5 states. [2020-10-27 05:17:13,655 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:14,251 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:14,757 INFO L93 Difference]: Finished difference Result 1261 states and 1860 transitions. [2020-10-27 05:17:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:17:14,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 05:17:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:14,761 INFO L225 Difference]: With dead ends: 1261 [2020-10-27 05:17:14,761 INFO L226 Difference]: Without dead ends: 862 [2020-10-27 05:17:14,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:17:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2020-10-27 05:17:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 851. [2020-10-27 05:17:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-10-27 05:17:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1224 transitions. [2020-10-27 05:17:15,042 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1224 transitions. Word has length 77 [2020-10-27 05:17:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:15,043 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 1224 transitions. [2020-10-27 05:17:15,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:17:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1224 transitions. [2020-10-27 05:17:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:17:15,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:15,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1] [2020-10-27 05:17:15,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:17:15,044 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash 813914383, now seen corresponding path program 1 times [2020-10-27 05:17:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:15,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839165127] [2020-10-27 05:17:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:15,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:17:15,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:15,417 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:15,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:15,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:15,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839165127] [2020-10-27 05:17:15,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:15,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315719409] [2020-10-27 05:17:15,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:17:15,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:15,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:17:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:15,466 INFO L87 Difference]: Start difference. First operand 851 states and 1224 transitions. Second operand 5 states. [2020-10-27 05:17:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:16,445 INFO L93 Difference]: Finished difference Result 1396 states and 2024 transitions. [2020-10-27 05:17:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:17:16,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-27 05:17:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:16,451 INFO L225 Difference]: With dead ends: 1396 [2020-10-27 05:17:16,451 INFO L226 Difference]: Without dead ends: 1393 [2020-10-27 05:17:16,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2020-10-27 05:17:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 867. [2020-10-27 05:17:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-10-27 05:17:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1236 transitions. [2020-10-27 05:17:16,756 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1236 transitions. Word has length 78 [2020-10-27 05:17:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:16,757 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 1236 transitions. [2020-10-27 05:17:16,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:17:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1236 transitions. [2020-10-27 05:17:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:17:16,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:16,760 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, 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, 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, 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, 1] [2020-10-27 05:17:16,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:17:16,760 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1366867315, now seen corresponding path program 1 times [2020-10-27 05:17:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:16,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869513294] [2020-10-27 05:17:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:16,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:17,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:17,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:17,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:18,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:21,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:21,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 05:17:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:22,197 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:22,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:22,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869513294] [2020-10-27 05:17:22,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:22,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:17:22,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308627719] [2020-10-27 05:17:22,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:17:22,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:17:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:17:22,274 INFO L87 Difference]: Start difference. First operand 867 states and 1236 transitions. Second operand 8 states. [2020-10-27 05:17:22,532 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:23,882 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:24,170 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:17:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:25,264 INFO L93 Difference]: Finished difference Result 3693 states and 5386 transitions. [2020-10-27 05:17:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:17:25,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-27 05:17:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:25,275 INFO L225 Difference]: With dead ends: 3693 [2020-10-27 05:17:25,275 INFO L226 Difference]: Without dead ends: 2934 [2020-10-27 05:17:25,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:17:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2020-10-27 05:17:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1377. [2020-10-27 05:17:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2020-10-27 05:17:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1956 transitions. [2020-10-27 05:17:25,849 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1956 transitions. Word has length 101 [2020-10-27 05:17:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:25,849 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 1956 transitions. [2020-10-27 05:17:25,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:17:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1956 transitions. [2020-10-27 05:17:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:17:25,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:25,856 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, 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, 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, 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, 1] [2020-10-27 05:17:25,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:17:25,856 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -910668929, now seen corresponding path program 1 times [2020-10-27 05:17:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:25,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393547171] [2020-10-27 05:17:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:25,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:25,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3173 [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:17:29,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:17:29,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 05:17:29,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:29,337 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:29,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:29,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:29,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393547171] [2020-10-27 05:17:29,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:17:29,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 05:17:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123616829] [2020-10-27 05:17:29,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:17:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:17:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:17:29,369 INFO L87 Difference]: Start difference. First operand 1377 states and 1956 transitions. Second operand 7 states. [2020-10-27 05:17:29,666 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:30,851 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:31,247 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:31,540 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:17:32,857 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:17:33,144 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:17:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:33,691 INFO L93 Difference]: Finished difference Result 7346 states and 10726 transitions. [2020-10-27 05:17:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:17:33,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-27 05:17:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:33,717 INFO L225 Difference]: With dead ends: 7346 [2020-10-27 05:17:33,718 INFO L226 Difference]: Without dead ends: 6139 [2020-10-27 05:17:33,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:17:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2020-10-27 05:17:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 3125. [2020-10-27 05:17:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3125 states. [2020-10-27 05:17:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4502 transitions. [2020-10-27 05:17:34,833 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4502 transitions. Word has length 101 [2020-10-27 05:17:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:34,834 INFO L481 AbstractCegarLoop]: Abstraction has 3125 states and 4502 transitions. [2020-10-27 05:17:34,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:17:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4502 transitions. [2020-10-27 05:17:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:17:34,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:34,837 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, 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, 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, 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, 1] [2020-10-27 05:17:34,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:17:34,837 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:34,838 INFO L82 PathProgramCache]: Analyzing trace with hash 765530297, now seen corresponding path program 1 times [2020-10-27 05:17:34,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:34,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886191318] [2020-10-27 05:17:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:35,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:36,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:36,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:39,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:39,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 05:17:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:40,274 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:40,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:40,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886191318] [2020-10-27 05:17:40,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:40,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:17:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131512650] [2020-10-27 05:17:40,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:17:40,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:17:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:17:40,325 INFO L87 Difference]: Start difference. First operand 3125 states and 4502 transitions. Second operand 8 states. [2020-10-27 05:17:40,596 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:42,056 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:17:42,362 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:46,771 INFO L93 Difference]: Finished difference Result 16021 states and 23188 transitions. [2020-10-27 05:17:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:17:46,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-27 05:17:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:46,804 INFO L225 Difference]: With dead ends: 16021 [2020-10-27 05:17:46,804 INFO L226 Difference]: Without dead ends: 13066 [2020-10-27 05:17:46,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:17:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2020-10-27 05:17:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 6317. [2020-10-27 05:17:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6317 states. [2020-10-27 05:17:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 9052 transitions. [2020-10-27 05:17:49,036 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 9052 transitions. Word has length 101 [2020-10-27 05:17:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:49,036 INFO L481 AbstractCegarLoop]: Abstraction has 6317 states and 9052 transitions. [2020-10-27 05:17:49,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:17:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 9052 transitions. [2020-10-27 05:17:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:17:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:49,046 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, 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, 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, 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, 1, 1] [2020-10-27 05:17:49,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:17:49,046 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1667590021, now seen corresponding path program 1 times [2020-10-27 05:17:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:49,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402550345] [2020-10-27 05:17:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:17:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:54,523 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:54,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:54,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402550345] [2020-10-27 05:17:54,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:54,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:17:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182246488] [2020-10-27 05:17:54,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:17:54,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:17:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:17:54,575 INFO L87 Difference]: Start difference. First operand 6317 states and 9052 transitions. Second operand 12 states. [2020-10-27 05:17:54,939 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:57,167 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:17:57,438 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:18:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:01,185 INFO L93 Difference]: Finished difference Result 12822 states and 18259 transitions. [2020-10-27 05:18:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:18:01,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2020-10-27 05:18:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:01,210 INFO L225 Difference]: With dead ends: 12822 [2020-10-27 05:18:01,210 INFO L226 Difference]: Without dead ends: 10227 [2020-10-27 05:18:01,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:18:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2020-10-27 05:18:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 6329. [2020-10-27 05:18:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6329 states. [2020-10-27 05:18:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 9070 transitions. [2020-10-27 05:18:03,682 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 9070 transitions. Word has length 102 [2020-10-27 05:18:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:03,683 INFO L481 AbstractCegarLoop]: Abstraction has 6329 states and 9070 transitions. [2020-10-27 05:18:03,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:18:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 9070 transitions. [2020-10-27 05:18:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:18:03,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:03,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1] [2020-10-27 05:18:03,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:18:03,691 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash 739792966, now seen corresponding path program 1 times [2020-10-27 05:18:03,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:03,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545555695] [2020-10-27 05:18:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:03,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:03,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:03,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:04,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 05:18:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:18:04,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:04,465 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:04,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:04,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:04,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:04,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:18:04,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:04,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545555695] [2020-10-27 05:18:04,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:04,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:18:04,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345495681] [2020-10-27 05:18:04,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:18:04,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:18:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:18:04,494 INFO L87 Difference]: Start difference. First operand 6329 states and 9070 transitions. Second operand 4 states. [2020-10-27 05:18:04,755 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:18:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:07,395 INFO L93 Difference]: Finished difference Result 12019 states and 17234 transitions. [2020-10-27 05:18:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:18:07,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-27 05:18:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:07,411 INFO L225 Difference]: With dead ends: 12019 [2020-10-27 05:18:07,411 INFO L226 Difference]: Without dead ends: 5868 [2020-10-27 05:18:07,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:18:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2020-10-27 05:18:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 4867. [2020-10-27 05:18:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4867 states. [2020-10-27 05:18:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 6820 transitions. [2020-10-27 05:18:09,383 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 6820 transitions. Word has length 103 [2020-10-27 05:18:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:09,383 INFO L481 AbstractCegarLoop]: Abstraction has 4867 states and 6820 transitions. [2020-10-27 05:18:09,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:18:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 6820 transitions. [2020-10-27 05:18:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 05:18:09,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:09,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1] [2020-10-27 05:18:09,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:18:09,385 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1677369427, now seen corresponding path program 1 times [2020-10-27 05:18:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103151187] [2020-10-27 05:18:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:09,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:18:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:09,940 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:18:09,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:18:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:09,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103151187] [2020-10-27 05:18:09,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:09,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:18:09,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402354382] [2020-10-27 05:18:09,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:18:09,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:18:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:18:09,967 INFO L87 Difference]: Start difference. First operand 4867 states and 6820 transitions. Second operand 4 states. [2020-10-27 05:18:10,246 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:18:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:14,175 INFO L93 Difference]: Finished difference Result 13829 states and 19348 transitions. [2020-10-27 05:18:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:18:14,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-10-27 05:18:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:14,186 INFO L225 Difference]: With dead ends: 13829 [2020-10-27 05:18:14,186 INFO L226 Difference]: Without dead ends: 9118 [2020-10-27 05:18:14,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:18:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2020-10-27 05:18:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 8465. [2020-10-27 05:18:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8465 states. [2020-10-27 05:18:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8465 states to 8465 states and 11792 transitions. [2020-10-27 05:18:17,281 INFO L78 Accepts]: Start accepts. Automaton has 8465 states and 11792 transitions. Word has length 104 [2020-10-27 05:18:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:17,281 INFO L481 AbstractCegarLoop]: Abstraction has 8465 states and 11792 transitions. [2020-10-27 05:18:17,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:18:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8465 states and 11792 transitions. [2020-10-27 05:18:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 05:18:17,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:17,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:17,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:18:17,286 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1224382217, now seen corresponding path program 1 times [2020-10-27 05:18:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980750145] [2020-10-27 05:18:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 05:18:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:17,700 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:17,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:17,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:17,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:17,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:18:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:17,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980750145] [2020-10-27 05:18:17,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:17,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:18:17,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379117124] [2020-10-27 05:18:17,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:18:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:18:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:18:17,734 INFO L87 Difference]: Start difference. First operand 8465 states and 11792 transitions. Second operand 4 states. [2020-10-27 05:18:18,017 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 147