/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-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:42:01,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:42:01,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:42:01,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:42:01,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:42:01,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:42:01,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:42:01,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:42:01,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:42:01,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:42:01,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:42:01,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:42:01,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:42:01,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:42:01,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:42:01,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:42:01,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:42:01,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:42:01,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:42:01,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:42:01,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:42:01,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:42:01,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:42:01,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:42:01,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:42:01,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:42:01,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:42:01,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:42:01,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:42:01,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:42:01,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:42:01,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:42:01,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:42:01,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:42:01,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:42:01,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:42:01,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:42:01,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:42:01,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:42:01,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:42:01,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:42:01,247 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 05:42:01,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:42:01,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:42:01,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:42:01,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:42:01,303 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:42:01,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:42:01,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:42:01,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:42:01,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:42:01,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:42:01,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:42:01,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:42:01,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:42:01,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:42:01,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:42:01,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:42:01,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:42:01,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:42:01,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:42:01,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:42:01,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:42:01,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:42:01,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:42:01,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:42:01,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:42:01,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:42:01,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:42:01,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:42:01,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:42:01,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:42:01,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:42:01,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:42:01,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:42:01,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:42:01,716 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:42:01,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:42:01,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4d49c57/ab3d8f590b2a47caa373e83961646db1/FLAG1519edcc2 [2020-10-27 05:42:02,642 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:42:02,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:42:02,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4d49c57/ab3d8f590b2a47caa373e83961646db1/FLAG1519edcc2 [2020-10-27 05:42:02,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a4d49c57/ab3d8f590b2a47caa373e83961646db1 [2020-10-27 05:42:02,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:42:02,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:42:02,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:42:02,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:42:02,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:42:02,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:42:02" (1/1) ... [2020-10-27 05:42:02,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e250d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:02, skipping insertion in model container [2020-10-27 05:42:02,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:42:02" (1/1) ... [2020-10-27 05:42:02,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:42:02,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:42:03,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:42:03,676 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:42:03,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:42:03,923 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:42:03,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03 WrapperNode [2020-10-27 05:42:03,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:42:03,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:42:03,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:42:03,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:42:03,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:03,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:03,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:03,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:04,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:04,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:04,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (1/1) ... [2020-10-27 05:42:04,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:42:04,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:42:04,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:42:04,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:42:04,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (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 05:42:04,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:42:04,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:42:04,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:42:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:42:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:42:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:42:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:42:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:42:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:42:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:42:04,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:42:04,241 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:42:04,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:42:04,241 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:42:04,241 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:42:04,242 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:42:04,242 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:42:04,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:42:04,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:42:04,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:42:04,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:42:04,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:42:06,931 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:42:06,931 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:42:06,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:42:06 BoogieIcfgContainer [2020-10-27 05:42:06,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:42:06,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:42:06,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:42:06,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:42:06,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:42:02" (1/3) ... [2020-10-27 05:42:06,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165d6fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:42:06, skipping insertion in model container [2020-10-27 05:42:06,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:42:03" (2/3) ... [2020-10-27 05:42:06,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165d6fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:42:06, skipping insertion in model container [2020-10-27 05:42:06,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:42:06" (3/3) ... [2020-10-27 05:42:06,949 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:42:06,963 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:42:06,969 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:42:06,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:42:07,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:42:07,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:42:07,019 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:42:07,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:42:07,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:42:07,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:42:07,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:42:07,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:42:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states. [2020-10-27 05:42:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:42:07,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:07,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:07,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2133721457, now seen corresponding path program 1 times [2020-10-27 05:42:07,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:07,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304794890] [2020-10-27 05:42:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:07,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:07,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:07,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:08,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:12,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:12,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:42:12,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:42:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:42:12,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:42:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:42:12,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:42:13,541 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:42:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:13,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:13,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:13,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:13,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 05:42:13,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:13,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:13,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:13,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:13,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:13,670 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 05:42:13,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304794890] [2020-10-27 05:42:13,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:13,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:42:13,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311257507] [2020-10-27 05:42:13,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:42:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:42:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:42:13,697 INFO L87 Difference]: Start difference. First operand 714 states. Second operand 6 states. [2020-10-27 05:42:14,762 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-27 05:42:20,181 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-27 05:42:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:20,712 INFO L93 Difference]: Finished difference Result 1231 states and 2138 transitions. [2020-10-27 05:42:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:42:20,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:42:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:20,736 INFO L225 Difference]: With dead ends: 1231 [2020-10-27 05:42:20,736 INFO L226 Difference]: Without dead ends: 702 [2020-10-27 05:42:20,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:42:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-27 05:42:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 699. [2020-10-27 05:42:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-10-27 05:42:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 963 transitions. [2020-10-27 05:42:20,870 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 963 transitions. Word has length 68 [2020-10-27 05:42:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:20,870 INFO L481 AbstractCegarLoop]: Abstraction has 699 states and 963 transitions. [2020-10-27 05:42:20,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:42:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 963 transitions. [2020-10-27 05:42:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:42:20,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:20,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:20,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:42:20,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1127228090, now seen corresponding path program 1 times [2020-10-27 05:42:20,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:20,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810350830] [2020-10-27 05:42:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:21,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:21,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:21,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:21,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:25,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:25,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:25,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:42:25,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:27,054 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:42:27,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:27,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:27,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:27,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:27,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 05:42:27,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:27,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:27,189 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 05:42:27,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810350830] [2020-10-27 05:42:27,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:27,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:42:27,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552981380] [2020-10-27 05:42:27,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:42:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:42:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:42:27,206 INFO L87 Difference]: Start difference. First operand 699 states and 963 transitions. Second operand 8 states. [2020-10-27 05:42:28,151 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:42:32,259 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:42:33,923 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:42:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:34,075 INFO L93 Difference]: Finished difference Result 1629 states and 2358 transitions. [2020-10-27 05:42:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:42:34,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-27 05:42:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:34,088 INFO L225 Difference]: With dead ends: 1629 [2020-10-27 05:42:34,088 INFO L226 Difference]: Without dead ends: 1277 [2020-10-27 05:42:34,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:42:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-10-27 05:42:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 703. [2020-10-27 05:42:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-10-27 05:42:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 963 transitions. [2020-10-27 05:42:34,157 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 963 transitions. Word has length 69 [2020-10-27 05:42:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:34,158 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 963 transitions. [2020-10-27 05:42:34,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:42:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 963 transitions. [2020-10-27 05:42:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:42:34,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:34,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:34,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:42:34,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:34,164 INFO L82 PathProgramCache]: Analyzing trace with hash 738140781, now seen corresponding path program 1 times [2020-10-27 05:42:34,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:34,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317336608] [2020-10-27 05:42:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:34,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:35,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:37,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:39,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:42:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:39,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:42:39,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:40,398 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:42:40,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:40,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:40,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:40,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:40,506 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 05:42:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317336608] [2020-10-27 05:42:40,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:40,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:42:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361379298] [2020-10-27 05:42:40,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:42:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:42:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:42:40,510 INFO L87 Difference]: Start difference. First operand 703 states and 963 transitions. Second operand 8 states. [2020-10-27 05:42:41,413 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:42:45,430 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:42:47,222 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:42:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:47,383 INFO L93 Difference]: Finished difference Result 1718 states and 2484 transitions. [2020-10-27 05:42:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:42:47,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 05:42:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:47,394 INFO L225 Difference]: With dead ends: 1718 [2020-10-27 05:42:47,394 INFO L226 Difference]: Without dead ends: 1501 [2020-10-27 05:42:47,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:42:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-10-27 05:42:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 726. [2020-10-27 05:42:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-10-27 05:42:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 990 transitions. [2020-10-27 05:42:47,452 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 990 transitions. Word has length 70 [2020-10-27 05:42:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:47,453 INFO L481 AbstractCegarLoop]: Abstraction has 726 states and 990 transitions. [2020-10-27 05:42:47,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:42:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 990 transitions. [2020-10-27 05:42:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:42:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:47,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:47,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:42:47,456 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1707623901, now seen corresponding path program 1 times [2020-10-27 05:42:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:47,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410976131] [2020-10-27 05:42:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:47,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:47,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:48,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:52,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:42:52,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:42:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:42:52,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:42:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:42:52,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:42:53,418 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:42:53,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:53,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:53,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:53,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:42:53,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:53,512 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 05:42:53,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410976131] [2020-10-27 05:42:53,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:42:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137808049] [2020-10-27 05:42:53,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:42:53,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:42:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:42:53,515 INFO L87 Difference]: Start difference. First operand 726 states and 990 transitions. Second operand 6 states. [2020-10-27 05:42:54,483 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-27 05:42:57,924 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-27 05:42:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:58,454 INFO L93 Difference]: Finished difference Result 1415 states and 1976 transitions. [2020-10-27 05:42:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:42:58,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 05:42:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:58,461 INFO L225 Difference]: With dead ends: 1415 [2020-10-27 05:42:58,461 INFO L226 Difference]: Without dead ends: 900 [2020-10-27 05:42:58,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:42:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-10-27 05:42:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 896. [2020-10-27 05:42:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-10-27 05:42:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1236 transitions. [2020-10-27 05:42:58,529 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1236 transitions. Word has length 70 [2020-10-27 05:42:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:58,530 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1236 transitions. [2020-10-27 05:42:58,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:42:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1236 transitions. [2020-10-27 05:42:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:42:58,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:58,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:58,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:42:58,533 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash 935281942, now seen corresponding path program 1 times [2020-10-27 05:42:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:58,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31313573] [2020-10-27 05:42:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:59,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:03,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:03,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:43:03,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:43:03,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:43:03,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:43:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:43:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:04,786 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:43:04,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:04,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:04,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:04,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:04,879 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 05:43:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31313573] [2020-10-27 05:43:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:04,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:43:04,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669586094] [2020-10-27 05:43:04,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:43:04,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:43:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:43:04,886 INFO L87 Difference]: Start difference. First operand 896 states and 1236 transitions. Second operand 8 states. [2020-10-27 05:43:05,777 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:43:09,445 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:43:11,525 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:43:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:11,806 INFO L93 Difference]: Finished difference Result 2702 states and 3896 transitions. [2020-10-27 05:43:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:11,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 05:43:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:11,818 INFO L225 Difference]: With dead ends: 2702 [2020-10-27 05:43:11,818 INFO L226 Difference]: Without dead ends: 2358 [2020-10-27 05:43:11,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2020-10-27 05:43:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 898. [2020-10-27 05:43:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-27 05:43:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1238 transitions. [2020-10-27 05:43:11,903 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1238 transitions. Word has length 70 [2020-10-27 05:43:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:11,904 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1238 transitions. [2020-10-27 05:43:11,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1238 transitions. [2020-10-27 05:43:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:43:11,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:11,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:43:11,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:43:11,907 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1146293205, now seen corresponding path program 1 times [2020-10-27 05:43:11,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646122760] [2020-10-27 05:43:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:11,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:12,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:12,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:12,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:13,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:13,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:16,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:16,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:43:16,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:43:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:43:16,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:43:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:43:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:18,089 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:43:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:18,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:18,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:18,192 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 05:43:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646122760] [2020-10-27 05:43:18,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:18,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:43:18,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174428353] [2020-10-27 05:43:18,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:43:18,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:43:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:43:18,195 INFO L87 Difference]: Start difference. First operand 898 states and 1238 transitions. Second operand 8 states. [2020-10-27 05:43:19,114 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:43:22,790 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:43:24,853 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:43:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:25,094 INFO L93 Difference]: Finished difference Result 2510 states and 3588 transitions. [2020-10-27 05:43:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:25,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 05:43:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:25,105 INFO L225 Difference]: With dead ends: 2510 [2020-10-27 05:43:25,105 INFO L226 Difference]: Without dead ends: 2185 [2020-10-27 05:43:25,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2020-10-27 05:43:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 945. [2020-10-27 05:43:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2020-10-27 05:43:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1301 transitions. [2020-10-27 05:43:25,195 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1301 transitions. Word has length 70 [2020-10-27 05:43:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:25,195 INFO L481 AbstractCegarLoop]: Abstraction has 945 states and 1301 transitions. [2020-10-27 05:43:25,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1301 transitions. [2020-10-27 05:43:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:43:25,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:25,197 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] [2020-10-27 05:43:25,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:43:25,198 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1962753505, now seen corresponding path program 1 times [2020-10-27 05:43:25,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:25,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950375486] [2020-10-27 05:43:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:25,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:25,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:30,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:43:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:31,245 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:43:31,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:31,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:31,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:31,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:31,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:43:31,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:31,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:31,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:31,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:31,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:31,318 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 05:43:31,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950375486] [2020-10-27 05:43:31,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:31,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:43:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545312100] [2020-10-27 05:43:31,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:43:31,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:43:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:43:31,320 INFO L87 Difference]: Start difference. First operand 945 states and 1301 transitions. Second operand 8 states. [2020-10-27 05:43:32,269 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:43:35,950 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:43:37,987 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:43:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:38,246 INFO L93 Difference]: Finished difference Result 2508 states and 3566 transitions. [2020-10-27 05:43:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:38,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 05:43:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:38,254 INFO L225 Difference]: With dead ends: 2508 [2020-10-27 05:43:38,254 INFO L226 Difference]: Without dead ends: 2187 [2020-10-27 05:43:38,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-10-27 05:43:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 962. [2020-10-27 05:43:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-10-27 05:43:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1326 transitions. [2020-10-27 05:43:38,347 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1326 transitions. Word has length 71 [2020-10-27 05:43:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:38,347 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1326 transitions. [2020-10-27 05:43:38,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1326 transitions. [2020-10-27 05:43:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:43:38,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:38,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:43:38,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:43:38,350 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1362730671, now seen corresponding path program 1 times [2020-10-27 05:43:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293330374] [2020-10-27 05:43:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:38,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:38,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:38,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:39,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:40,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:41,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:43,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:43,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:43:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:44,371 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:43:44,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:44,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:44,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:44,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:43:44,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:44,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:44,443 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 05:43:44,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293330374] [2020-10-27 05:43:44,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:43:44,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681407366] [2020-10-27 05:43:44,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:43:44,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:43:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:43:44,445 INFO L87 Difference]: Start difference. First operand 962 states and 1326 transitions. Second operand 11 states. [2020-10-27 05:43:45,389 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-27 05:43:51,362 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 369 DAG size of output: 368 [2020-10-27 05:43:52,592 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2020-10-27 05:43:58,906 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2020-10-27 05:43:59,834 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2020-10-27 05:44:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:00,797 INFO L93 Difference]: Finished difference Result 8292 states and 11993 transitions. [2020-10-27 05:44:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-27 05:44:00,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-27 05:44:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:00,825 INFO L225 Difference]: With dead ends: 8292 [2020-10-27 05:44:00,826 INFO L226 Difference]: Without dead ends: 7538 [2020-10-27 05:44:00,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2867 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1267, Invalid=6215, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 05:44:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2020-10-27 05:44:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 1238. [2020-10-27 05:44:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1238 states. [2020-10-27 05:44:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1720 transitions. [2020-10-27 05:44:01,039 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1720 transitions. Word has length 71 [2020-10-27 05:44:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:01,039 INFO L481 AbstractCegarLoop]: Abstraction has 1238 states and 1720 transitions. [2020-10-27 05:44:01,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:44:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1720 transitions. [2020-10-27 05:44:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:01,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:01,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:44:01,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:44:01,042 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1835516986, now seen corresponding path program 1 times [2020-10-27 05:44:01,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:01,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928221411] [2020-10-27 05:44:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:01,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:01,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:06,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:06,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:44:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:44:06,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:44:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:44:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:07,091 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:44:07,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:07,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:07,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:07,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:07,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:07,160 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 05:44:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928221411] [2020-10-27 05:44:07,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:07,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:44:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105556412] [2020-10-27 05:44:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:44:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:44:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:44:07,162 INFO L87 Difference]: Start difference. First operand 1238 states and 1720 transitions. Second operand 8 states. [2020-10-27 05:44:08,091 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:44:11,719 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:44:13,568 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:44:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:13,964 INFO L93 Difference]: Finished difference Result 4452 states and 6384 transitions. [2020-10-27 05:44:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:44:13,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 05:44:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:13,980 INFO L225 Difference]: With dead ends: 4452 [2020-10-27 05:44:13,980 INFO L226 Difference]: Without dead ends: 3796 [2020-10-27 05:44:13,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:44:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2020-10-27 05:44:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 1247. [2020-10-27 05:44:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2020-10-27 05:44:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1721 transitions. [2020-10-27 05:44:14,155 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1721 transitions. Word has length 71 [2020-10-27 05:44:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:14,156 INFO L481 AbstractCegarLoop]: Abstraction has 1247 states and 1721 transitions. [2020-10-27 05:44:14,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:44:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1721 transitions. [2020-10-27 05:44:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:14,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:14,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:44:14,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:44:14,159 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2052344671, now seen corresponding path program 1 times [2020-10-27 05:44:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:14,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577635344] [2020-10-27 05:44:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:14,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:14,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:15,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:19,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:19,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:19,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:44:19,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:44:19,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:44:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:20,120 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:44:20,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:20,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:20,200 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 05:44:20,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577635344] [2020-10-27 05:44:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:44:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500404034] [2020-10-27 05:44:20,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:44:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:44:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:44:20,202 INFO L87 Difference]: Start difference. First operand 1247 states and 1721 transitions. Second operand 6 states. [2020-10-27 05:44:21,138 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:44:24,426 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:44:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:25,006 INFO L93 Difference]: Finished difference Result 2792 states and 3893 transitions. [2020-10-27 05:44:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:44:25,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:44:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:25,012 INFO L225 Difference]: With dead ends: 2792 [2020-10-27 05:44:25,013 INFO L226 Difference]: Without dead ends: 1776 [2020-10-27 05:44:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:44:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2020-10-27 05:44:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1772. [2020-10-27 05:44:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1772 states. [2020-10-27 05:44:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2424 transitions. [2020-10-27 05:44:25,274 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2424 transitions. Word has length 71 [2020-10-27 05:44:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:25,274 INFO L481 AbstractCegarLoop]: Abstraction has 1772 states and 2424 transitions. [2020-10-27 05:44:25,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:44:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2424 transitions. [2020-10-27 05:44:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:44:25,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:25,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:44:25,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:44:25,277 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1453660329, now seen corresponding path program 1 times [2020-10-27 05:44:25,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:25,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98541679] [2020-10-27 05:44:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:25,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:26,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:27,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2344 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:44:27,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:44:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:28,948 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:44:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:28,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:44:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:28,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:44:28,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:29,026 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 05:44:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98541679] [2020-10-27 05:44:29,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:29,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:44:29,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024657584] [2020-10-27 05:44:29,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:44:29,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:44:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:44:29,029 INFO L87 Difference]: Start difference. First operand 1772 states and 2424 transitions. Second operand 13 states. [2020-10-27 05:44:30,036 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-27 05:44:30,727 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 05:44:34,656 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2020-10-27 05:44:35,801 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2020-10-27 05:44:36,856 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2020-10-27 05:44:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:39,435 INFO L93 Difference]: Finished difference Result 6252 states and 8946 transitions. [2020-10-27 05:44:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:44:39,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 05:44:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:39,455 INFO L225 Difference]: With dead ends: 6252 [2020-10-27 05:44:39,455 INFO L226 Difference]: Without dead ends: 4771 [2020-10-27 05:44:39,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:44:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2020-10-27 05:44:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2759. [2020-10-27 05:44:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2759 states. [2020-10-27 05:44:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3914 transitions. [2020-10-27 05:44:39,912 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3914 transitions. Word has length 72 [2020-10-27 05:44:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:39,912 INFO L481 AbstractCegarLoop]: Abstraction has 2759 states and 3914 transitions. [2020-10-27 05:44:39,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:44:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3914 transitions. [2020-10-27 05:44:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:44:39,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:39,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:44:39,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:44:39,915 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash -731362857, now seen corresponding path program 1 times [2020-10-27 05:44:39,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:39,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622028397] [2020-10-27 05:44:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:39,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:44,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:44:44,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:45,930 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:44:45,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:46,000 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 05:44:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622028397] [2020-10-27 05:44:46,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:44:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882990975] [2020-10-27 05:44:46,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:44:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:44:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:44:46,002 INFO L87 Difference]: Start difference. First operand 2759 states and 3914 transitions. Second operand 8 states. [2020-10-27 05:44:46,958 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-27 05:44:50,106 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:44:52,899 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:44:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:54,584 INFO L93 Difference]: Finished difference Result 14904 states and 21646 transitions. [2020-10-27 05:44:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:44:54,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-27 05:44:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:54,610 INFO L225 Difference]: With dead ends: 14904 [2020-10-27 05:44:54,610 INFO L226 Difference]: Without dead ends: 12952 [2020-10-27 05:44:54,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:44:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12952 states. [2020-10-27 05:44:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12952 to 2764. [2020-10-27 05:44:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2764 states. [2020-10-27 05:44:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3921 transitions. [2020-10-27 05:44:55,172 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3921 transitions. Word has length 72 [2020-10-27 05:44:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:55,173 INFO L481 AbstractCegarLoop]: Abstraction has 2764 states and 3921 transitions. [2020-10-27 05:44:55,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:44:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3921 transitions. [2020-10-27 05:44:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:44:55,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:55,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:44:55,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:44:55,176 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1567494202, now seen corresponding path program 1 times [2020-10-27 05:44:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:55,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613462096] [2020-10-27 05:44:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:56,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:56,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:00,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:45:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:01,224 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:45:01,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:01,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:01,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:01,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:01,306 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 05:45:01,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613462096] [2020-10-27 05:45:01,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:01,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:45:01,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604457391] [2020-10-27 05:45:01,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:45:01,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:01,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:45:01,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:45:01,308 INFO L87 Difference]: Start difference. First operand 2764 states and 3921 transitions. Second operand 9 states. [2020-10-27 05:45:02,236 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-27 05:45:06,243 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:45:09,849 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-27 05:45:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:13,353 INFO L93 Difference]: Finished difference Result 27515 states and 39973 transitions. [2020-10-27 05:45:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:45:13,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-27 05:45:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:13,404 INFO L225 Difference]: With dead ends: 27515 [2020-10-27 05:45:13,404 INFO L226 Difference]: Without dead ends: 25315 [2020-10-27 05:45:13,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:45:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25315 states. [2020-10-27 05:45:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25315 to 2867. [2020-10-27 05:45:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2867 states. [2020-10-27 05:45:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 4047 transitions. [2020-10-27 05:45:14,213 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 4047 transitions. Word has length 73 [2020-10-27 05:45:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:14,213 INFO L481 AbstractCegarLoop]: Abstraction has 2867 states and 4047 transitions. [2020-10-27 05:45:14,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:45:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 4047 transitions. [2020-10-27 05:45:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:45:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:14,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:14,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:45:14,216 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 135949081, now seen corresponding path program 1 times [2020-10-27 05:45:14,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:14,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895081487] [2020-10-27 05:45:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:45:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:19,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:45:19,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:20,213 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:45:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:20,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:20,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:20,276 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 05:45:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895081487] [2020-10-27 05:45:20,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:20,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:45:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80733775] [2020-10-27 05:45:20,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:45:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:45:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:45:20,277 INFO L87 Difference]: Start difference. First operand 2867 states and 4047 transitions. Second operand 8 states. [2020-10-27 05:45:21,202 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-27 05:45:24,402 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:45:27,169 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:45:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:28,953 INFO L93 Difference]: Finished difference Result 13426 states and 19430 transitions. [2020-10-27 05:45:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:45:28,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-27 05:45:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:28,973 INFO L225 Difference]: With dead ends: 13426 [2020-10-27 05:45:28,974 INFO L226 Difference]: Without dead ends: 11512 [2020-10-27 05:45:28,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:45:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2020-10-27 05:45:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 2897. [2020-10-27 05:45:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2897 states. [2020-10-27 05:45:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4089 transitions. [2020-10-27 05:45:29,588 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4089 transitions. Word has length 73 [2020-10-27 05:45:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:29,588 INFO L481 AbstractCegarLoop]: Abstraction has 2897 states and 4089 transitions. [2020-10-27 05:45:29,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:45:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4089 transitions. [2020-10-27 05:45:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:45:29,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:29,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:29,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:45:29,591 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:29,592 INFO L82 PathProgramCache]: Analyzing trace with hash 346960344, now seen corresponding path program 1 times [2020-10-27 05:45:29,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:29,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164343397] [2020-10-27 05:45:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:31,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:31,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:34,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:34,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:45:34,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:45:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4857 [2020-10-27 05:45:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:45:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:45:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:45:35,550 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:45:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:35,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:35,616 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 05:45:35,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164343397] [2020-10-27 05:45:35,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:35,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:45:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680649735] [2020-10-27 05:45:35,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:45:35,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:45:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:45:35,618 INFO L87 Difference]: Start difference. First operand 2897 states and 4089 transitions. Second operand 12 states. [2020-10-27 05:45:36,563 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 357