/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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:10:30,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:10:30,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:10:30,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:10:30,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:10:30,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:10:30,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:10:30,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:10:30,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:10:30,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:10:30,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:10:30,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:10:30,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:10:30,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:10:30,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:10:30,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:10:30,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:10:30,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:10:30,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:10:30,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:10:30,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:10:30,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:10:30,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:10:30,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:10:30,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:10:30,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:10:30,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:10:30,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:10:30,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:10:30,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:10:30,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:10:30,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:10:30,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:10:30,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:10:30,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:10:30,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:10:30,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:10:30,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:10:30,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:10:30,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:10:30,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:10:30,168 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 05:10:30,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:10:30,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:10:30,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:10:30,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:10:30,199 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:10:30,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:10:30,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:10:30,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:10:30,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:10:30,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:10:30,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:10:30,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:10:30,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:10:30,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:10:30,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:10:30,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:10:30,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:10:30,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:10:30,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:10:30,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:10:30,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:10:30,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:10:30,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:10:30,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:10:30,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:10:30,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:10:30,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:10:30,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:10:30,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:10:30,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:10:30,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:10:30,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:10:30,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:10:30,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:10:30,618 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:10:30,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:10:30,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13999fac0/6eafb323df624579933e61b7273aa5ca/FLAG3af5a88a6 [2020-10-27 05:10:31,383 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:10:31,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:10:31,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13999fac0/6eafb323df624579933e61b7273aa5ca/FLAG3af5a88a6 [2020-10-27 05:10:31,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13999fac0/6eafb323df624579933e61b7273aa5ca [2020-10-27 05:10:31,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:10:31,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:10:31,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:31,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:10:31,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:10:31,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6bd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31, skipping insertion in model container [2020-10-27 05:10:31,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:10:31,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:10:32,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:32,308 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:10:32,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:32,470 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:10:32,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32 WrapperNode [2020-10-27 05:10:32,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:32,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:10:32,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:10:32,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:10:32,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (1/1) ... [2020-10-27 05:10:32,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:10:32,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:10:32,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:10:32,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:10:32,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (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 05:10:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:10:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:10:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:10:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:10:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:10:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:10:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:10:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:10:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:10:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:10:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:10:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:10:33,943 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:10:33,943 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:10:33,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:33 BoogieIcfgContainer [2020-10-27 05:10:33,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:10:33,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:10:33,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:10:33,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:10:33,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:10:31" (1/3) ... [2020-10-27 05:10:33,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101de09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:33, skipping insertion in model container [2020-10-27 05:10:33,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:32" (2/3) ... [2020-10-27 05:10:33,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101de09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:33, skipping insertion in model container [2020-10-27 05:10:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:33" (3/3) ... [2020-10-27 05:10:33,955 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:10:33,968 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:10:33,973 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:10:33,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:10:34,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:10:34,013 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:10:34,013 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:10:34,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:10:34,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:10:34,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:10:34,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:10:34,013 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:10:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-27 05:10:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 05:10:34,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:34,049 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] [2020-10-27 05:10:34,049 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-27 05:10:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:34,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102495049] [2020-10-27 05:10:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:35,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:35,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:37,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:39,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 05:10:39,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:10:39,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:10:39,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:10:39,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:10:39,812 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:10:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:39,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:10:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:39,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:10:39,907 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 05:10:39,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102495049] [2020-10-27 05:10:39,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:39,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:10:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318578458] [2020-10-27 05:10:39,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:39,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:39,937 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 6 states. [2020-10-27 05:10:40,281 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:10:41,460 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:10:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:41,700 INFO L93 Difference]: Finished difference Result 414 states and 700 transitions. [2020-10-27 05:10:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:10:41,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-27 05:10:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:41,715 INFO L225 Difference]: With dead ends: 414 [2020-10-27 05:10:41,716 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 05:10:41,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:10:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 05:10:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 229. [2020-10-27 05:10:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 05:10:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2020-10-27 05:10:41,789 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 51 [2020-10-27 05:10:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:41,790 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2020-10-27 05:10:41,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:10:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2020-10-27 05:10:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:10:41,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:41,793 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] [2020-10-27 05:10:41,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:10:41,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2094149536, now seen corresponding path program 1 times [2020-10-27 05:10:41,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:41,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459763660] [2020-10-27 05:10:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:42,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:46,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:10:46,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:10:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:10:46,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:10:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:10:46,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:47,333 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:10:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:47,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:47,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:47,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:47,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:10:47,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:47,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:47,417 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 05:10:47,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459763660] [2020-10-27 05:10:47,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:47,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:10:47,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992969299] [2020-10-27 05:10:47,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:10:47,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:47,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:10:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:47,423 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand 11 states. [2020-10-27 05:10:47,991 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 180 [2020-10-27 05:10:49,734 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 178 [2020-10-27 05:10:50,312 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 172 [2020-10-27 05:10:50,589 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:10:51,081 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 174 [2020-10-27 05:10:51,325 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:10:52,801 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 180 [2020-10-27 05:10:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:53,026 INFO L93 Difference]: Finished difference Result 1631 states and 2410 transitions. [2020-10-27 05:10:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:10:53,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:10:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:53,039 INFO L225 Difference]: With dead ends: 1631 [2020-10-27 05:10:53,039 INFO L226 Difference]: Without dead ends: 1471 [2020-10-27 05:10:53,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:10:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2020-10-27 05:10:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 234. [2020-10-27 05:10:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 05:10:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 307 transitions. [2020-10-27 05:10:53,104 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 307 transitions. Word has length 52 [2020-10-27 05:10:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:53,105 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 307 transitions. [2020-10-27 05:10:53,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:10:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 307 transitions. [2020-10-27 05:10:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:10:53,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:53,112 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] [2020-10-27 05:10:53,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:10:53,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 725720351, now seen corresponding path program 1 times [2020-10-27 05:10:53,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:53,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320828716] [2020-10-27 05:10:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:53,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:56,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:58,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:58,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:10:58,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:10:58,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:10:58,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:10:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:10:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:58,451 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:10:58,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:58,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:58,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:10:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:58,517 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 05:10:58,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320828716] [2020-10-27 05:10:58,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:58,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:10:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381058391] [2020-10-27 05:10:58,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:10:58,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:58,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:10:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:10:58,524 INFO L87 Difference]: Start difference. First operand 234 states and 307 transitions. Second operand 9 states. [2020-10-27 05:10:58,769 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:10:59,637 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:10:59,931 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:00,209 INFO L93 Difference]: Finished difference Result 425 states and 577 transitions. [2020-10-27 05:11:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:11:00,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 05:11:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:00,212 INFO L225 Difference]: With dead ends: 425 [2020-10-27 05:11:00,212 INFO L226 Difference]: Without dead ends: 297 [2020-10-27 05:11:00,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:11:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-27 05:11:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 234. [2020-10-27 05:11:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 05:11:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 305 transitions. [2020-10-27 05:11:00,243 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 305 transitions. Word has length 52 [2020-10-27 05:11:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:00,244 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 305 transitions. [2020-10-27 05:11:00,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:11:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 305 transitions. [2020-10-27 05:11:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:00,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:00,246 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] [2020-10-27 05:11:00,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:11:00,246 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:00,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1306243887, now seen corresponding path program 1 times [2020-10-27 05:11:00,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:00,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076825217] [2020-10-27 05:11:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:00,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:05,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:05,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:05,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:11:05,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:11:05,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:11:05,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:05,593 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:05,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:05,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:05,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:05,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:11:05,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:05,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:05,680 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 05:11:05,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076825217] [2020-10-27 05:11:05,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:05,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:11:05,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942780608] [2020-10-27 05:11:05,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:05,683 INFO L87 Difference]: Start difference. First operand 234 states and 305 transitions. Second operand 10 states. [2020-10-27 05:11:05,945 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:11:07,052 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:11:07,311 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:07,541 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:11:07,828 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:08,428 INFO L93 Difference]: Finished difference Result 600 states and 813 transitions. [2020-10-27 05:11:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:11:08,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 05:11:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:08,437 INFO L225 Difference]: With dead ends: 600 [2020-10-27 05:11:08,437 INFO L226 Difference]: Without dead ends: 513 [2020-10-27 05:11:08,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:11:08,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-27 05:11:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 291. [2020-10-27 05:11:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 05:11:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 392 transitions. [2020-10-27 05:11:08,485 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 392 transitions. Word has length 53 [2020-10-27 05:11:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:08,486 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 392 transitions. [2020-10-27 05:11:08,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 392 transitions. [2020-10-27 05:11:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:08,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:08,488 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] [2020-10-27 05:11:08,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:11:08,488 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1406790542, now seen corresponding path program 1 times [2020-10-27 05:11:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164014074] [2020-10-27 05:11:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:08,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:11,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:13,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:11:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:14,030 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:14,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:14,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:14,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:14,128 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 05:11:14,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164014074] [2020-10-27 05:11:14,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:14,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:11:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909655562] [2020-10-27 05:11:14,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:11:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:11:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:11:14,133 INFO L87 Difference]: Start difference. First operand 291 states and 392 transitions. Second operand 15 states. [2020-10-27 05:11:14,739 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 180 [2020-10-27 05:11:16,225 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:16,497 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:11:16,849 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:11:17,097 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:11:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:18,897 INFO L93 Difference]: Finished difference Result 1125 states and 1661 transitions. [2020-10-27 05:11:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:11:18,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-27 05:11:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:18,904 INFO L225 Difference]: With dead ends: 1125 [2020-10-27 05:11:18,904 INFO L226 Difference]: Without dead ends: 990 [2020-10-27 05:11:18,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:11:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2020-10-27 05:11:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 291. [2020-10-27 05:11:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 05:11:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 391 transitions. [2020-10-27 05:11:18,952 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 391 transitions. Word has length 53 [2020-10-27 05:11:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:18,952 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 391 transitions. [2020-10-27 05:11:18,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:11:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 391 transitions. [2020-10-27 05:11:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:11:18,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:18,953 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] [2020-10-27 05:11:18,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:11:18,954 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1614820578, now seen corresponding path program 1 times [2020-10-27 05:11:18,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:18,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654750759] [2020-10-27 05:11:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:22,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:23,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:24,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:11:24,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:24,239 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:24,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:24,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:24,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:24,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:24,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:11:24,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:24,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:11:24,302 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 05:11:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654750759] [2020-10-27 05:11:24,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:24,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221971325] [2020-10-27 05:11:24,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:24,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:24,307 INFO L87 Difference]: Start difference. First operand 291 states and 391 transitions. Second operand 6 states. [2020-10-27 05:11:24,536 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:11:25,243 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:25,524 INFO L93 Difference]: Finished difference Result 635 states and 889 transitions. [2020-10-27 05:11:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:25,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:11:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:25,528 INFO L225 Difference]: With dead ends: 635 [2020-10-27 05:11:25,528 INFO L226 Difference]: Without dead ends: 421 [2020-10-27 05:11:25,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-27 05:11:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 405. [2020-10-27 05:11:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 05:11:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 570 transitions. [2020-10-27 05:11:25,593 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 570 transitions. Word has length 54 [2020-10-27 05:11:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:25,593 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 570 transitions. [2020-10-27 05:11:25,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 570 transitions. [2020-10-27 05:11:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:11:25,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:25,595 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] [2020-10-27 05:11:25,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:11:25,595 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash -531791454, now seen corresponding path program 1 times [2020-10-27 05:11:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:25,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527280762] [2020-10-27 05:11:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:30,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:11:30,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:11:30,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:31,075 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:31,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:11:31,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:31,122 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 05:11:31,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527280762] [2020-10-27 05:11:31,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:31,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:11:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348200063] [2020-10-27 05:11:31,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:11:31,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:11:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:11:31,124 INFO L87 Difference]: Start difference. First operand 405 states and 570 transitions. Second operand 13 states. [2020-10-27 05:11:31,692 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2020-10-27 05:11:32,761 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:11:32,982 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:33,302 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:11:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:34,408 INFO L93 Difference]: Finished difference Result 1372 states and 2041 transitions. [2020-10-27 05:11:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:11:34,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-27 05:11:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:34,417 INFO L225 Difference]: With dead ends: 1372 [2020-10-27 05:11:34,417 INFO L226 Difference]: Without dead ends: 1114 [2020-10-27 05:11:34,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:11:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-10-27 05:11:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 405. [2020-10-27 05:11:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 05:11:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 569 transitions. [2020-10-27 05:11:34,501 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 569 transitions. Word has length 54 [2020-10-27 05:11:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:34,501 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 569 transitions. [2020-10-27 05:11:34,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:11:34,501 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 569 transitions. [2020-10-27 05:11:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:11:34,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:34,503 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] [2020-10-27 05:11:34,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:11:34,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash -431244799, now seen corresponding path program 1 times [2020-10-27 05:11:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:34,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233429481] [2020-10-27 05:11:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:34,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:36,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:11:39,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:11:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:39,946 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:39,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:39,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:40,022 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 05:11:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233429481] [2020-10-27 05:11:40,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:40,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:11:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874583962] [2020-10-27 05:11:40,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:11:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:11:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:11:40,030 INFO L87 Difference]: Start difference. First operand 405 states and 569 transitions. Second operand 14 states. [2020-10-27 05:11:40,712 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 199 [2020-10-27 05:11:42,182 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:42,695 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 176 [2020-10-27 05:11:42,960 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:11:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:44,503 INFO L93 Difference]: Finished difference Result 1475 states and 2194 transitions. [2020-10-27 05:11:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:11:44,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 05:11:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:44,510 INFO L225 Difference]: With dead ends: 1475 [2020-10-27 05:11:44,510 INFO L226 Difference]: Without dead ends: 1147 [2020-10-27 05:11:44,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:11:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-10-27 05:11:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 510. [2020-10-27 05:11:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-27 05:11:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 737 transitions. [2020-10-27 05:11:44,617 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 737 transitions. Word has length 54 [2020-10-27 05:11:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:44,617 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 737 transitions. [2020-10-27 05:11:44,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:11:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 737 transitions. [2020-10-27 05:11:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:11:44,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:44,619 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] [2020-10-27 05:11:44,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:11:44,619 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1876796794, now seen corresponding path program 1 times [2020-10-27 05:11:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453511769] [2020-10-27 05:11:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:44,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:47,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:11:47,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:11:47,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2389 [2020-10-27 05:11:47,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:11:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:11:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:47,311 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:47,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:47,352 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 05:11:47,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453511769] [2020-10-27 05:11:47,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:47,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:11:47,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771372883] [2020-10-27 05:11:47,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:11:47,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:47,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:11:47,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:11:47,354 INFO L87 Difference]: Start difference. First operand 510 states and 737 transitions. Second operand 8 states. [2020-10-27 05:11:47,608 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:11:48,474 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 177 [2020-10-27 05:11:48,730 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:11:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:48,981 INFO L93 Difference]: Finished difference Result 763 states and 1125 transitions. [2020-10-27 05:11:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:11:48,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:11:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:48,983 INFO L225 Difference]: With dead ends: 763 [2020-10-27 05:11:48,983 INFO L226 Difference]: Without dead ends: 361 [2020-10-27 05:11:48,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:11:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-27 05:11:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 351. [2020-10-27 05:11:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 05:11:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2020-10-27 05:11:49,052 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 56 [2020-10-27 05:11:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:49,052 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2020-10-27 05:11:49,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:11:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2020-10-27 05:11:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:11:49,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:49,054 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] [2020-10-27 05:11:49,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:11:49,054 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 867709920, now seen corresponding path program 1 times [2020-10-27 05:11:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619529693] [2020-10-27 05:11:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:51,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:51,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:11:51,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2901 [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:51,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:52,379 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:52,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:52,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:52,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:52,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:11:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:52,422 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 05:11:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619529693] [2020-10-27 05:11:52,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:52,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:11:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163949153] [2020-10-27 05:11:52,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:11:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:11:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:11:52,424 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand 13 states. [2020-10-27 05:11:52,673 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:11:53,563 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:11:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:53,888 INFO L93 Difference]: Finished difference Result 353 states and 501 transitions. [2020-10-27 05:11:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:11:53,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 05:11:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:53,892 INFO L225 Difference]: With dead ends: 353 [2020-10-27 05:11:53,892 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 05:11:53,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:11:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 05:11:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2020-10-27 05:11:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-27 05:11:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 496 transitions. [2020-10-27 05:11:53,987 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 496 transitions. Word has length 56 [2020-10-27 05:11:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:53,987 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 496 transitions. [2020-10-27 05:11:53,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:11:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 496 transitions. [2020-10-27 05:11:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:11:53,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:53,988 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] [2020-10-27 05:11:53,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:11:53,989 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash 368085089, now seen corresponding path program 1 times [2020-10-27 05:11:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:53,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293630139] [2020-10-27 05:11:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:57,111 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:57,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:57,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:57,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:11:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:57,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:57,165 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 05:11:57,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293630139] [2020-10-27 05:11:57,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:57,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:11:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101556272] [2020-10-27 05:11:57,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:11:57,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:11:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:11:57,167 INFO L87 Difference]: Start difference. First operand 348 states and 496 transitions. Second operand 11 states. [2020-10-27 05:11:57,442 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:11:58,233 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:11:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:59,280 INFO L93 Difference]: Finished difference Result 1100 states and 1610 transitions. [2020-10-27 05:11:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:11:59,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:11:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:59,286 INFO L225 Difference]: With dead ends: 1100 [2020-10-27 05:11:59,287 INFO L226 Difference]: Without dead ends: 833 [2020-10-27 05:11:59,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:11:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2020-10-27 05:11:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 352. [2020-10-27 05:11:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 05:11:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 500 transitions. [2020-10-27 05:11:59,373 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 500 transitions. Word has length 57 [2020-10-27 05:11:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:59,373 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 500 transitions. [2020-10-27 05:11:59,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:11:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 500 transitions. [2020-10-27 05:11:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:11:59,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:59,374 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] [2020-10-27 05:11:59,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:11:59,375 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1067713812, now seen corresponding path program 1 times [2020-10-27 05:11:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113883881] [2020-10-27 05:11:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:04,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:12:04,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:04,834 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:04,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:04,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:04,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:04,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:04,889 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 05:12:04,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113883881] [2020-10-27 05:12:04,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:04,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:12:04,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71385345] [2020-10-27 05:12:04,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:12:04,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:12:04,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:12:04,891 INFO L87 Difference]: Start difference. First operand 352 states and 500 transitions. Second operand 14 states. [2020-10-27 05:12:05,463 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 184 [2020-10-27 05:12:06,495 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:06,944 INFO L93 Difference]: Finished difference Result 364 states and 511 transitions. [2020-10-27 05:12:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:12:06,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 05:12:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:06,946 INFO L225 Difference]: With dead ends: 364 [2020-10-27 05:12:06,946 INFO L226 Difference]: Without dead ends: 356 [2020-10-27 05:12:06,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:12:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-27 05:12:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-10-27 05:12:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 05:12:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 499 transitions. [2020-10-27 05:12:07,039 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 499 transitions. Word has length 57 [2020-10-27 05:12:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:07,039 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 499 transitions. [2020-10-27 05:12:07,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:12:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 499 transitions. [2020-10-27 05:12:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:12:07,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:07,040 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] [2020-10-27 05:12:07,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:12:07,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1875712707, now seen corresponding path program 1 times [2020-10-27 05:12:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:07,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591495369] [2020-10-27 05:12:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:07,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:09,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:09,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:12:09,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:12:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2679 [2020-10-27 05:12:09,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:12:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:09,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:10,413 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:10,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:10,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:10,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:10,464 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 05:12:10,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591495369] [2020-10-27 05:12:10,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:10,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:12:10,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123697943] [2020-10-27 05:12:10,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:12:10,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:10,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:12:10,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:12:10,467 INFO L87 Difference]: Start difference. First operand 352 states and 499 transitions. Second operand 17 states. [2020-10-27 05:12:10,604 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 05:12:11,258 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 205 [2020-10-27 05:12:11,783 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 05:12:13,022 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:13,588 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 184 [2020-10-27 05:12:13,877 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:12:14,381 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 05:12:15,717 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 05:12:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:16,051 INFO L93 Difference]: Finished difference Result 1659 states and 2492 transitions. [2020-10-27 05:12:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:12:16,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-27 05:12:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:16,059 INFO L225 Difference]: With dead ends: 1659 [2020-10-27 05:12:16,059 INFO L226 Difference]: Without dead ends: 1403 [2020-10-27 05:12:16,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:12:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-10-27 05:12:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 356. [2020-10-27 05:12:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-27 05:12:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 504 transitions. [2020-10-27 05:12:16,170 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 504 transitions. Word has length 58 [2020-10-27 05:12:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:16,170 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 504 transitions. [2020-10-27 05:12:16,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:12:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 504 transitions. [2020-10-27 05:12:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:12:16,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:16,171 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] [2020-10-27 05:12:16,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:12:16,172 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 795371964, now seen corresponding path program 1 times [2020-10-27 05:12:16,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:16,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608524021] [2020-10-27 05:12:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,840 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:17,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:17,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:17,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:17,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:17,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:17,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,871 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 05:12:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608524021] [2020-10-27 05:12:17,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:17,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:12:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596019492] [2020-10-27 05:12:17,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:12:17,873 INFO L87 Difference]: Start difference. First operand 356 states and 504 transitions. Second operand 15 states. [2020-10-27 05:12:18,240 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:12:19,219 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:12:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:20,157 INFO L93 Difference]: Finished difference Result 879 states and 1303 transitions. [2020-10-27 05:12:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:12:20,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-27 05:12:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:20,160 INFO L225 Difference]: With dead ends: 879 [2020-10-27 05:12:20,160 INFO L226 Difference]: Without dead ends: 872 [2020-10-27 05:12:20,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:12:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2020-10-27 05:12:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 363. [2020-10-27 05:12:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-27 05:12:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 514 transitions. [2020-10-27 05:12:20,260 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 514 transitions. Word has length 59 [2020-10-27 05:12:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:20,260 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 514 transitions. [2020-10-27 05:12:20,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:12:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 514 transitions. [2020-10-27 05:12:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:12:20,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:20,261 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] [2020-10-27 05:12:20,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:12:20,262 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash -113879204, now seen corresponding path program 1 times [2020-10-27 05:12:20,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:20,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895841531] [2020-10-27 05:12:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:12:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:21,781 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:21,812 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 05:12:21,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895841531] [2020-10-27 05:12:21,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:21,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:21,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332313490] [2020-10-27 05:12:21,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:21,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:21,814 INFO L87 Difference]: Start difference. First operand 363 states and 514 transitions. Second operand 9 states. [2020-10-27 05:12:22,076 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:12:22,685 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:22,961 INFO L93 Difference]: Finished difference Result 365 states and 515 transitions. [2020-10-27 05:12:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:12:22,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 05:12:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:22,963 INFO L225 Difference]: With dead ends: 365 [2020-10-27 05:12:22,964 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 05:12:22,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:12:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 05:12:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-10-27 05:12:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 05:12:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 501 transitions. [2020-10-27 05:12:23,060 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 501 transitions. Word has length 59 [2020-10-27 05:12:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:23,060 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 501 transitions. [2020-10-27 05:12:23,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 501 transitions. [2020-10-27 05:12:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:12:23,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:23,061 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] [2020-10-27 05:12:23,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:12:23,062 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:23,062 INFO L82 PathProgramCache]: Analyzing trace with hash 579272600, now seen corresponding path program 1 times [2020-10-27 05:12:23,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:23,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871994979] [2020-10-27 05:12:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:23,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:23,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:12:23,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-27 05:12:23,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:23,976 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:23,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:23,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:23,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:24,002 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 05:12:24,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871994979] [2020-10-27 05:12:24,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:24,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:24,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631649102] [2020-10-27 05:12:24,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:24,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:24,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:24,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:24,004 INFO L87 Difference]: Start difference. First operand 352 states and 501 transitions. Second operand 9 states. [2020-10-27 05:12:24,242 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:25,114 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:25,348 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:12:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:25,384 INFO L93 Difference]: Finished difference Result 478 states and 693 transitions. [2020-10-27 05:12:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:25,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-27 05:12:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:25,386 INFO L225 Difference]: With dead ends: 478 [2020-10-27 05:12:25,386 INFO L226 Difference]: Without dead ends: 471 [2020-10-27 05:12:25,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-10-27 05:12:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 340. [2020-10-27 05:12:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-27 05:12:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 484 transitions. [2020-10-27 05:12:25,491 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 484 transitions. Word has length 60 [2020-10-27 05:12:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:25,492 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 484 transitions. [2020-10-27 05:12:25,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 484 transitions. [2020-10-27 05:12:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:12:25,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:25,493 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 05:12:25,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:12:25,494 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1239929659, now seen corresponding path program 1 times [2020-10-27 05:12:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:25,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770923360] [2020-10-27 05:12:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:30,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:12:30,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:30,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:12:30,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:30,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:30,794 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:30,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:30,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:12:30,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:30,837 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 05:12:30,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770923360] [2020-10-27 05:12:30,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:30,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:30,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033759809] [2020-10-27 05:12:30,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:30,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:30,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:30,839 INFO L87 Difference]: Start difference. First operand 340 states and 484 transitions. Second operand 10 states. [2020-10-27 05:12:31,135 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:12:32,071 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:32,098 INFO L93 Difference]: Finished difference Result 608 states and 888 transitions. [2020-10-27 05:12:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:32,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:12:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:32,100 INFO L225 Difference]: With dead ends: 608 [2020-10-27 05:12:32,100 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 05:12:32,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:12:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 05:12:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 332. [2020-10-27 05:12:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 05:12:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 474 transitions. [2020-10-27 05:12:32,187 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 474 transitions. Word has length 76 [2020-10-27 05:12:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:32,187 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 474 transitions. [2020-10-27 05:12:32,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 474 transitions. [2020-10-27 05:12:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:12:32,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:32,188 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 05:12:32,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:12:32,189 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1275383932, now seen corresponding path program 1 times [2020-10-27 05:12:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:32,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090030835] [2020-10-27 05:12:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4991 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:37,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:37,581 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:37,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:37,625 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 05:12:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090030835] [2020-10-27 05:12:37,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:37,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:37,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695572650] [2020-10-27 05:12:37,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:37,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:37,627 INFO L87 Difference]: Start difference. First operand 332 states and 474 transitions. Second operand 12 states. [2020-10-27 05:12:38,213 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 183 [2020-10-27 05:12:41,684 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 181 [2020-10-27 05:12:41,976 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:12:42,559 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2020-10-27 05:12:42,866 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:12:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:43,659 INFO L93 Difference]: Finished difference Result 2422 states and 3594 transitions. [2020-10-27 05:12:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:12:43,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-27 05:12:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:43,669 INFO L225 Difference]: With dead ends: 2422 [2020-10-27 05:12:43,670 INFO L226 Difference]: Without dead ends: 2173 [2020-10-27 05:12:43,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:12:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2020-10-27 05:12:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 332. [2020-10-27 05:12:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 05:12:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 473 transitions. [2020-10-27 05:12:43,819 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 473 transitions. Word has length 77 [2020-10-27 05:12:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:43,819 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 473 transitions. [2020-10-27 05:12:43,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:12:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 473 transitions. [2020-10-27 05:12:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:12:43,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:43,821 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 05:12:43,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:12:43,821 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -425053307, now seen corresponding path program 1 times [2020-10-27 05:12:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:43,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403899631] [2020-10-27 05:12:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:43,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:48,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:48,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:12:48,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:12:48,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:12:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:49,142 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:49,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:49,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:49,187 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 05:12:49,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403899631] [2020-10-27 05:12:49,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:49,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:49,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230061402] [2020-10-27 05:12:49,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:49,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:49,189 INFO L87 Difference]: Start difference. First operand 332 states and 473 transitions. Second operand 10 states. [2020-10-27 05:12:49,463 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:50,900 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:51,404 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 173 [2020-10-27 05:12:51,627 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:51,816 INFO L93 Difference]: Finished difference Result 948 states and 1428 transitions. [2020-10-27 05:12:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:12:51,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-27 05:12:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:51,820 INFO L225 Difference]: With dead ends: 948 [2020-10-27 05:12:51,820 INFO L226 Difference]: Without dead ends: 699 [2020-10-27 05:12:51,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:12:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-27 05:12:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 332. [2020-10-27 05:12:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 05:12:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 472 transitions. [2020-10-27 05:12:51,936 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 472 transitions. Word has length 78 [2020-10-27 05:12:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:51,936 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 472 transitions. [2020-10-27 05:12:51,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 472 transitions. [2020-10-27 05:12:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:12:51,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:51,937 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, 1] [2020-10-27 05:12:51,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:12:51,938 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1438209585, now seen corresponding path program 1 times [2020-10-27 05:12:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:51,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369722989] [2020-10-27 05:12:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:12:56,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:57,714 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:57,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:57,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:57,783 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 05:12:57,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369722989] [2020-10-27 05:12:57,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:57,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:12:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245816587] [2020-10-27 05:12:57,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:12:57,787 INFO L87 Difference]: Start difference. First operand 332 states and 472 transitions. Second operand 15 states. [2020-10-27 05:12:57,974 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 05:12:58,674 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2020-10-27 05:12:59,063 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 05:13:00,816 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:13:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:00,921 INFO L93 Difference]: Finished difference Result 906 states and 1344 transitions. [2020-10-27 05:13:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:13:00,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-10-27 05:13:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:00,925 INFO L225 Difference]: With dead ends: 906 [2020-10-27 05:13:00,925 INFO L226 Difference]: Without dead ends: 736 [2020-10-27 05:13:00,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:13:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-27 05:13:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 342. [2020-10-27 05:13:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-27 05:13:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 483 transitions. [2020-10-27 05:13:01,037 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 483 transitions. Word has length 79 [2020-10-27 05:13:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:01,038 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 483 transitions. [2020-10-27 05:13:01,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:13:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 483 transitions. [2020-10-27 05:13:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:13:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:01,039 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, 1, 1] [2020-10-27 05:13:01,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:13:01,039 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1747871245, now seen corresponding path program 1 times [2020-10-27 05:13:01,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:01,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278105824] [2020-10-27 05:13:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:02,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:13:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:02,614 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:02,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:02,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:02,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:02,643 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 05:13:02,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278105824] [2020-10-27 05:13:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914343256] [2020-10-27 05:13:02,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:02,645 INFO L87 Difference]: Start difference. First operand 342 states and 483 transitions. Second operand 6 states. [2020-10-27 05:13:02,886 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:03,692 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:03,909 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:13:04,177 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:04,417 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:13:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:04,645 INFO L93 Difference]: Finished difference Result 1800 states and 2757 transitions. [2020-10-27 05:13:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:04,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-27 05:13:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:04,652 INFO L225 Difference]: With dead ends: 1800 [2020-10-27 05:13:04,652 INFO L226 Difference]: Without dead ends: 1557 [2020-10-27 05:13:04,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:13:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2020-10-27 05:13:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 582. [2020-10-27 05:13:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-27 05:13:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 848 transitions. [2020-10-27 05:13:04,865 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 848 transitions. Word has length 80 [2020-10-27 05:13:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:04,866 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 848 transitions. [2020-10-27 05:13:04,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 848 transitions. [2020-10-27 05:13:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:04,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:04,867 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, 1, 1, 1, 1] [2020-10-27 05:13:04,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:13:04,868 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:04,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1916699429, now seen corresponding path program 1 times [2020-10-27 05:13:04,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:04,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018934235] [2020-10-27 05:13:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:13:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,162 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:10,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:10,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:10,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,208 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 05:13:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018934235] [2020-10-27 05:13:10,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:10,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122738769] [2020-10-27 05:13:10,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:10,210 INFO L87 Difference]: Start difference. First operand 582 states and 848 transitions. Second operand 10 states. [2020-10-27 05:13:10,449 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:12,061 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:12,957 INFO L93 Difference]: Finished difference Result 2197 states and 3274 transitions. [2020-10-27 05:13:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:13:12,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-10-27 05:13:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:12,967 INFO L225 Difference]: With dead ends: 2197 [2020-10-27 05:13:12,967 INFO L226 Difference]: Without dead ends: 1714 [2020-10-27 05:13:12,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:13:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-10-27 05:13:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 748. [2020-10-27 05:13:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-10-27 05:13:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1104 transitions. [2020-10-27 05:13:13,209 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1104 transitions. Word has length 82 [2020-10-27 05:13:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:13,209 INFO L481 AbstractCegarLoop]: Abstraction has 748 states and 1104 transitions. [2020-10-27 05:13:13,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1104 transitions. [2020-10-27 05:13:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:13,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:13,211 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, 1, 1, 1, 1] [2020-10-27 05:13:13,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:13:13,211 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash 622087018, now seen corresponding path program 1 times [2020-10-27 05:13:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:13,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306371107] [2020-10-27 05:13:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:14,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:13:14,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:14,550 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:14,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:14,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:14,587 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 05:13:14,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306371107] [2020-10-27 05:13:14,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:14,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:14,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181596588] [2020-10-27 05:13:14,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:14,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:14,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:14,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:14,589 INFO L87 Difference]: Start difference. First operand 748 states and 1104 transitions. Second operand 6 states. [2020-10-27 05:13:14,863 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:15,755 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:13:16,038 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:16,279 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:16,770 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:16,855 INFO L93 Difference]: Finished difference Result 2230 states and 3378 transitions. [2020-10-27 05:13:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:16,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:13:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:16,862 INFO L225 Difference]: With dead ends: 2230 [2020-10-27 05:13:16,862 INFO L226 Difference]: Without dead ends: 1747 [2020-10-27 05:13:16,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:13:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2020-10-27 05:13:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 748. [2020-10-27 05:13:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-10-27 05:13:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1098 transitions. [2020-10-27 05:13:17,099 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1098 transitions. Word has length 82 [2020-10-27 05:13:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:17,099 INFO L481 AbstractCegarLoop]: Abstraction has 748 states and 1098 transitions. [2020-10-27 05:13:17,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1098 transitions. [2020-10-27 05:13:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:17,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:17,100 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, 1, 1, 1, 1] [2020-10-27 05:13:17,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:13:17,101 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash 81106379, now seen corresponding path program 1 times [2020-10-27 05:13:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:17,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784386038] [2020-10-27 05:13:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:13:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,490 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:18,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,523 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 05:13:18,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784386038] [2020-10-27 05:13:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:18,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456130636] [2020-10-27 05:13:18,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:13:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:13:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:13:18,524 INFO L87 Difference]: Start difference. First operand 748 states and 1098 transitions. Second operand 5 states. [2020-10-27 05:13:18,780 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:19,620 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:19,834 INFO L93 Difference]: Finished difference Result 1867 states and 2796 transitions. [2020-10-27 05:13:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:19,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-27 05:13:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:19,839 INFO L225 Difference]: With dead ends: 1867 [2020-10-27 05:13:19,839 INFO L226 Difference]: Without dead ends: 1246 [2020-10-27 05:13:19,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2020-10-27 05:13:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1231. [2020-10-27 05:13:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2020-10-27 05:13:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1798 transitions. [2020-10-27 05:13:20,195 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1798 transitions. Word has length 82 [2020-10-27 05:13:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:20,195 INFO L481 AbstractCegarLoop]: Abstraction has 1231 states and 1798 transitions. [2020-10-27 05:13:20,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:13:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1798 transitions. [2020-10-27 05:13:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:20,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:20,197 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, 1, 1, 1, 1] [2020-10-27 05:13:20,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:13:20,197 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1001086507, now seen corresponding path program 1 times [2020-10-27 05:13:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:20,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121242003] [2020-10-27 05:13:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:25,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:25,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:13:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:25,604 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:25,703 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 05:13:25,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121242003] [2020-10-27 05:13:25,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:25,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:25,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111002480] [2020-10-27 05:13:25,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:25,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:25,708 INFO L87 Difference]: Start difference. First operand 1231 states and 1798 transitions. Second operand 12 states. [2020-10-27 05:13:26,018 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:13:29,287 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:29,565 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:13:29,864 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:13:30,125 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:30,389 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:32,054 INFO L93 Difference]: Finished difference Result 5741 states and 8354 transitions. [2020-10-27 05:13:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 05:13:32,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-27 05:13:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:32,075 INFO L225 Difference]: With dead ends: 5741 [2020-10-27 05:13:32,075 INFO L226 Difference]: Without dead ends: 5126 [2020-10-27 05:13:32,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 05:13:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2020-10-27 05:13:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 1219. [2020-10-27 05:13:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1219 states. [2020-10-27 05:13:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1774 transitions. [2020-10-27 05:13:32,526 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1774 transitions. Word has length 82 [2020-10-27 05:13:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:32,527 INFO L481 AbstractCegarLoop]: Abstraction has 1219 states and 1774 transitions. [2020-10-27 05:13:32,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1774 transitions. [2020-10-27 05:13:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:32,529 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, 1, 1, 1, 1] [2020-10-27 05:13:32,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:13:32,529 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash 802028049, now seen corresponding path program 1 times [2020-10-27 05:13:32,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:32,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989135078] [2020-10-27 05:13:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:37,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:37,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:13:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:13:37,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:13:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:37,884 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:37,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:37,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:37,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:37,929 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 05:13:37,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989135078] [2020-10-27 05:13:37,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:37,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:37,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171073236] [2020-10-27 05:13:37,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:37,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:37,931 INFO L87 Difference]: Start difference. First operand 1219 states and 1774 transitions. Second operand 11 states. [2020-10-27 05:13:38,209 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:40,511 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:13:40,789 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:13:41,048 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:42,867 INFO L93 Difference]: Finished difference Result 5484 states and 7922 transitions. [2020-10-27 05:13:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:13:42,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-27 05:13:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:42,883 INFO L225 Difference]: With dead ends: 5484 [2020-10-27 05:13:42,883 INFO L226 Difference]: Without dead ends: 4575 [2020-10-27 05:13:42,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:13:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2020-10-27 05:13:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 1207. [2020-10-27 05:13:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-10-27 05:13:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1750 transitions. [2020-10-27 05:13:43,363 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1750 transitions. Word has length 82 [2020-10-27 05:13:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 1207 states and 1750 transitions. [2020-10-27 05:13:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1750 transitions. [2020-10-27 05:13:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:13:43,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:43,365 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, 1, 1, 1, 1, 1] [2020-10-27 05:13:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 05:13:43,365 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1889763896, now seen corresponding path program 1 times [2020-10-27 05:13:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582055996] [2020-10-27 05:13:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:48,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:13:48,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:13:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:48,638 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:48,675 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 05:13:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582055996] [2020-10-27 05:13:48,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:48,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:13:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165554404] [2020-10-27 05:13:48,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:13:48,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:13:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:48,677 INFO L87 Difference]: Start difference. First operand 1207 states and 1750 transitions. Second operand 8 states. [2020-10-27 05:13:48,914 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:49,841 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:50,072 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:50,963 INFO L93 Difference]: Finished difference Result 2925 states and 4311 transitions. [2020-10-27 05:13:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:50,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-27 05:13:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:50,968 INFO L225 Difference]: With dead ends: 2925 [2020-10-27 05:13:50,968 INFO L226 Difference]: Without dead ends: 2381 [2020-10-27 05:13:50,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:13:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-27 05:13:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1464. [2020-10-27 05:13:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2020-10-27 05:13:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2114 transitions. [2020-10-27 05:13:51,504 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2114 transitions. Word has length 83 [2020-10-27 05:13:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:51,504 INFO L481 AbstractCegarLoop]: Abstraction has 1464 states and 2114 transitions. [2020-10-27 05:13:51,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:13:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2114 transitions. [2020-10-27 05:13:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:13:51,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:51,506 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, 1, 1, 1, 1, 1] [2020-10-27 05:13:51,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 05:13:51,506 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:51,507 INFO L82 PathProgramCache]: Analyzing trace with hash -116308668, now seen corresponding path program 1 times [2020-10-27 05:13:51,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:51,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069702633] [2020-10-27 05:13:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:51,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:53,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:53,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:13:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:53,601 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:53,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:53,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:53,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:53,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:53,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:13:53,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:53,646 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 05:13:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069702633] [2020-10-27 05:13:53,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:53,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:53,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581481622] [2020-10-27 05:13:53,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:53,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:53,648 INFO L87 Difference]: Start difference. First operand 1464 states and 2114 transitions. Second operand 6 states. [2020-10-27 05:13:53,876 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:54,612 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:13:54,845 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:55,475 INFO L93 Difference]: Finished difference Result 2781 states and 4108 transitions. [2020-10-27 05:13:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:13:55,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:13:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:55,479 INFO L225 Difference]: With dead ends: 2781 [2020-10-27 05:13:55,479 INFO L226 Difference]: Without dead ends: 2106 [2020-10-27 05:13:55,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-10-27 05:13:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2076. [2020-10-27 05:13:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-10-27 05:13:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2988 transitions. [2020-10-27 05:13:56,201 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2988 transitions. Word has length 83 [2020-10-27 05:13:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:56,202 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 2988 transitions. [2020-10-27 05:13:56,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2988 transitions. [2020-10-27 05:13:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:13:56,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:56,203 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, 1, 1, 1, 1, 1] [2020-10-27 05:13:56,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 05:13:56,203 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash 270136929, now seen corresponding path program 1 times [2020-10-27 05:13:56,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:56,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501525248] [2020-10-27 05:13:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 05:13:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 05:13:56,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:56,921 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:56,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:56,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:56,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:56,947 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 05:13:56,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501525248] [2020-10-27 05:13:56,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:56,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:13:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972035618] [2020-10-27 05:13:56,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:13:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:13:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:13:56,948 INFO L87 Difference]: Start difference. First operand 2076 states and 2988 transitions. Second operand 4 states. [2020-10-27 05:13:57,177 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:59,026 INFO L93 Difference]: Finished difference Result 5602 states and 8096 transitions. [2020-10-27 05:13:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:13:59,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:13:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:59,032 INFO L225 Difference]: With dead ends: 5602 [2020-10-27 05:13:59,032 INFO L226 Difference]: Without dead ends: 3715 [2020-10-27 05:13:59,036 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 05:13:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2020-10-27 05:14:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3592. [2020-10-27 05:14:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3592 states. [2020-10-27 05:14:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5140 transitions. [2020-10-27 05:14:00,379 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5140 transitions. Word has length 83 [2020-10-27 05:14:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:00,379 INFO L481 AbstractCegarLoop]: Abstraction has 3592 states and 5140 transitions. [2020-10-27 05:14:00,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5140 transitions. [2020-10-27 05:14:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:14:00,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:00,381 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, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:00,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 05:14:00,381 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1252987505, now seen corresponding path program 1 times [2020-10-27 05:14:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:00,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583760443] [2020-10-27 05:14:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:14:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:05,877 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:05,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:05,928 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 05:14:05,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583760443] [2020-10-27 05:14:05,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:05,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:14:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642269075] [2020-10-27 05:14:05,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:14:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:14:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:14:05,930 INFO L87 Difference]: Start difference. First operand 3592 states and 5140 transitions. Second operand 14 states. [2020-10-27 05:14:06,516 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 178 [2020-10-27 05:14:08,068 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:08,320 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:09,609 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:09,870 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:10,895 INFO L93 Difference]: Finished difference Result 8444 states and 12159 transitions. [2020-10-27 05:14:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:14:10,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 84 [2020-10-27 05:14:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:10,908 INFO L225 Difference]: With dead ends: 8444 [2020-10-27 05:14:10,908 INFO L226 Difference]: Without dead ends: 5053 [2020-10-27 05:14:10,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:14:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states.