/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:34:19,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:34:19,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:34:19,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:34:19,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:34:19,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:34:19,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:34:19,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:34:19,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:34:19,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:34:19,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:34:19,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:34:19,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:34:19,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:34:19,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:34:19,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:34:19,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:34:19,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:34:19,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:34:19,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:34:19,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:34:19,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:34:19,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:34:19,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:34:19,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:34:19,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:34:19,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:34:19,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:34:19,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:34:19,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:34:19,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:34:19,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:34:19,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:34:19,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:34:19,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:34:19,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:34:19,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:34:19,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:34:19,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:34:19,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:34:19,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:34:19,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:34:19,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:34:19,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:34:19,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:34:19,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:34:19,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:34:19,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:34:19,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:34:19,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:34:19,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:34:19,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:34:19,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:34:19,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:34:19,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:34:19,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:34:19,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:34:19,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:34:19,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:34:19,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:34:19,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:34:19,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:34:19,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:34:19,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:34:19,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:34:19,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:34:19,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:34:19,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:34:19,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:34:19,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:34:19,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:34:19,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:34:19,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:34:19,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:34:19,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:34:19,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:34:19,692 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:34:19,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:34:19,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b340279/eb20a6ea73ef4f9fb4c984be43741d46/FLAG6109528c2 [2020-10-28 18:34:20,602 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:34:20,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:34:20,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b340279/eb20a6ea73ef4f9fb4c984be43741d46/FLAG6109528c2 [2020-10-28 18:34:20,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b340279/eb20a6ea73ef4f9fb4c984be43741d46 [2020-10-28 18:34:20,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:34:20,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:34:20,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:34:20,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:34:20,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:34:20,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:34:20" (1/1) ... [2020-10-28 18:34:20,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdbbe7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:20, skipping insertion in model container [2020-10-28 18:34:20,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:34:20" (1/1) ... [2020-10-28 18:34:20,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:34:20,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:34:21,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:34:21,278 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:34:21,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:34:21,437 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:34:21,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21 WrapperNode [2020-10-28 18:34:21,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:34:21,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:34:21,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:34:21,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:34:21,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... [2020-10-28 18:34:21,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:34:21,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:34:21,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:34:21,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:34:21,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:34:21,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:34:21,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:34:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:34:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:34:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:34:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:34:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:34:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:34:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:34:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:34:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:34:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:34:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:34:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:34:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:34:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:34:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:34:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:34:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:34:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:34:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:34:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:34:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:34:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:34:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:34:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:34:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:34:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:34:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:34:22,610 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:34:22,611 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:34:22,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:34:22 BoogieIcfgContainer [2020-10-28 18:34:22,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:34:22,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:34:22,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:34:22,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:34:22,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:34:20" (1/3) ... [2020-10-28 18:34:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f2787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:34:22, skipping insertion in model container [2020-10-28 18:34:22,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:34:21" (2/3) ... [2020-10-28 18:34:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f2787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:34:22, skipping insertion in model container [2020-10-28 18:34:22,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:34:22" (3/3) ... [2020-10-28 18:34:22,623 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:34:22,636 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:34:22,642 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:34:22,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:34:22,683 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:34:22,684 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:34:22,684 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:34:22,684 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:34:22,684 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:34:22,684 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:34:22,684 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:34:22,685 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:34:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-10-28 18:34:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:34:22,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:22,717 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] [2020-10-28 18:34:22,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash -593336161, now seen corresponding path program 1 times [2020-10-28 18:34:22,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:22,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471401900] [2020-10-28 18:34:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:23,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:23,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:28,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:34:28,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:34:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:34:28,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:28,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:34:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:34:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:34:28,564 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:28,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:28,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:28,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:34:28,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:28,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:28,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:28,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:28,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:28,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:28,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471401900] [2020-10-28 18:34:28,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:28,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:34:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732685363] [2020-10-28 18:34:28,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:34:28,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:34:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:34:28,663 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2020-10-28 18:34:29,011 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:34:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:29,838 INFO L93 Difference]: Finished difference Result 228 states and 365 transitions. [2020-10-28 18:34:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:34:29,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 18:34:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:29,852 INFO L225 Difference]: With dead ends: 228 [2020-10-28 18:34:29,852 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 18:34:29,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:34:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 18:34:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-28 18:34:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 18:34:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-10-28 18:34:29,960 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 64 [2020-10-28 18:34:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:29,961 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-10-28 18:34:29,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:34:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-10-28 18:34:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:34:29,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:29,964 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] [2020-10-28 18:34:29,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:34:29,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash -259825147, now seen corresponding path program 1 times [2020-10-28 18:34:29,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:29,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922737934] [2020-10-28 18:34:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:32,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:35,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:35,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:34:35,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:34:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:34:35,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:35,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:34:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:34:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:35,310 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:35,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:35,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:35,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:35,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:35,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:34:35,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:35,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:35,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:35,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:35,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922737934] [2020-10-28 18:34:35,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:35,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:34:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211149235] [2020-10-28 18:34:35,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:34:35,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:34:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:34:35,380 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 4 states. [2020-10-28 18:34:35,690 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:34:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:36,260 INFO L93 Difference]: Finished difference Result 355 states and 540 transitions. [2020-10-28 18:34:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:34:36,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:34:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:36,264 INFO L225 Difference]: With dead ends: 355 [2020-10-28 18:34:36,264 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 18:34:36,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:34:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 18:34:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2020-10-28 18:34:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 18:34:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 360 transitions. [2020-10-28 18:34:36,303 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 360 transitions. Word has length 65 [2020-10-28 18:34:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:36,304 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 360 transitions. [2020-10-28 18:34:36,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:34:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 360 transitions. [2020-10-28 18:34:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:34:36,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:36,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:36,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:34:36,310 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:36,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1115930669, now seen corresponding path program 1 times [2020-10-28 18:34:36,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:36,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622923087] [2020-10-28 18:34:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:36,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:41,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:41,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:34:41,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:34:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:34:41,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:41,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:34:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:34:41,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:41,673 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:41,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:41,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:41,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:41,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:41,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:34:41,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:41,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622923087] [2020-10-28 18:34:41,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:41,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:34:41,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827694658] [2020-10-28 18:34:41,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:34:41,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:34:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:34:41,739 INFO L87 Difference]: Start difference. First operand 241 states and 360 transitions. Second operand 4 states. [2020-10-28 18:34:42,043 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:34:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:42,585 INFO L93 Difference]: Finished difference Result 615 states and 952 transitions. [2020-10-28 18:34:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:34:42,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:34:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:42,589 INFO L225 Difference]: With dead ends: 615 [2020-10-28 18:34:42,590 INFO L226 Difference]: Without dead ends: 412 [2020-10-28 18:34:42,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:34:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-28 18:34:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2020-10-28 18:34:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-28 18:34:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 624 transitions. [2020-10-28 18:34:42,630 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 624 transitions. Word has length 66 [2020-10-28 18:34:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:42,631 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 624 transitions. [2020-10-28 18:34:42,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:34:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 624 transitions. [2020-10-28 18:34:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:42,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:42,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:34:42,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:34:42,637 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1711559239, now seen corresponding path program 1 times [2020-10-28 18:34:42,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:42,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126507632] [2020-10-28 18:34:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:42,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:43,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:47,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:47,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:47,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:34:47,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:34:47,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:47,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:34:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:34:47,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:47,992 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:47,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:48,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:48,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:48,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:48,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:48,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126507632] [2020-10-28 18:34:48,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:48,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:34:48,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26329125] [2020-10-28 18:34:48,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:34:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:34:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:34:48,047 INFO L87 Difference]: Start difference. First operand 409 states and 624 transitions. Second operand 4 states. [2020-10-28 18:34:48,348 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:34:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:49,014 INFO L93 Difference]: Finished difference Result 1087 states and 1692 transitions. [2020-10-28 18:34:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:34:49,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:34:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:49,020 INFO L225 Difference]: With dead ends: 1087 [2020-10-28 18:34:49,020 INFO L226 Difference]: Without dead ends: 716 [2020-10-28 18:34:49,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:34:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-28 18:34:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 713. [2020-10-28 18:34:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 18:34:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1096 transitions. [2020-10-28 18:34:49,101 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1096 transitions. Word has length 67 [2020-10-28 18:34:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:49,102 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1096 transitions. [2020-10-28 18:34:49,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:34:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1096 transitions. [2020-10-28 18:34:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:34:49,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:49,105 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] [2020-10-28 18:34:49,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:34:49,105 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash -392431237, now seen corresponding path program 1 times [2020-10-28 18:34:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302347676] [2020-10-28 18:34:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:49,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:49,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:49,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:54,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:54,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:34:54,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:34:54,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:34:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:54,515 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:54,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:54,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:34:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:54,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:34:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302347676] [2020-10-28 18:34:54,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:54,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:34:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300450681] [2020-10-28 18:34:54,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:34:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:34:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:34:54,581 INFO L87 Difference]: Start difference. First operand 713 states and 1096 transitions. Second operand 4 states. [2020-10-28 18:34:54,866 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:34:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:55,469 INFO L93 Difference]: Finished difference Result 1935 states and 3004 transitions. [2020-10-28 18:34:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:34:55,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:34:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:55,480 INFO L225 Difference]: With dead ends: 1935 [2020-10-28 18:34:55,480 INFO L226 Difference]: Without dead ends: 1260 [2020-10-28 18:34:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:34:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2020-10-28 18:34:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1257. [2020-10-28 18:34:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-10-28 18:34:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1928 transitions. [2020-10-28 18:34:55,600 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1928 transitions. Word has length 68 [2020-10-28 18:34:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:55,600 INFO L481 AbstractCegarLoop]: Abstraction has 1257 states and 1928 transitions. [2020-10-28 18:34:55,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:34:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1928 transitions. [2020-10-28 18:34:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:34:55,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:55,614 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] [2020-10-28 18:34:55,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:34:55,614 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1595047153, now seen corresponding path program 1 times [2020-10-28 18:34:55,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572640020] [2020-10-28 18:34:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:55,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:58,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:58,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:34:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:34:58,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:59,049 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:34:59,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:59,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:59,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:59,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:59,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:59,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:34:59,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:59,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572640020] [2020-10-28 18:34:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:34:59,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096677310] [2020-10-28 18:34:59,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:34:59,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:34:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:34:59,127 INFO L87 Difference]: Start difference. First operand 1257 states and 1928 transitions. Second operand 6 states. [2020-10-28 18:34:59,434 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:35:00,170 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:35:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:00,352 INFO L93 Difference]: Finished difference Result 3679 states and 5676 transitions. [2020-10-28 18:35:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:35:00,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:35:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:00,370 INFO L225 Difference]: With dead ends: 3679 [2020-10-28 18:35:00,370 INFO L226 Difference]: Without dead ends: 2460 [2020-10-28 18:35:00,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:35:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-28 18:35:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2457. [2020-10-28 18:35:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-28 18:35:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3768 transitions. [2020-10-28 18:35:00,569 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3768 transitions. Word has length 69 [2020-10-28 18:35:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:00,571 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3768 transitions. [2020-10-28 18:35:00,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:35:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3768 transitions. [2020-10-28 18:35:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:35:00,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:00,572 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] [2020-10-28 18:35:00,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:35:00,572 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash 326675478, now seen corresponding path program 1 times [2020-10-28 18:35:00,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:00,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278165744] [2020-10-28 18:35:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:00,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:00,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:35:01,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:35:01,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:35:01,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:01,606 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:01,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:01,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:01,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:01,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278165744] [2020-10-28 18:35:01,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:01,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:35:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802007022] [2020-10-28 18:35:01,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:35:01,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:35:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:35:01,651 INFO L87 Difference]: Start difference. First operand 2457 states and 3768 transitions. Second operand 8 states. [2020-10-28 18:35:01,977 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:35:02,952 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:35:03,275 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:35:03,582 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:35:03,851 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:35:04,214 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:35:04,519 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:35:04,817 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:35:05,118 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:35:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:06,194 INFO L93 Difference]: Finished difference Result 26647 states and 41068 transitions. [2020-10-28 18:35:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:35:06,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:35:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:06,320 INFO L225 Difference]: With dead ends: 26647 [2020-10-28 18:35:06,320 INFO L226 Difference]: Without dead ends: 24228 [2020-10-28 18:35:06,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:35:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24228 states. [2020-10-28 18:35:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24228 to 4873. [2020-10-28 18:35:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4873 states. [2020-10-28 18:35:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7368 transitions. [2020-10-28 18:35:07,089 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7368 transitions. Word has length 69 [2020-10-28 18:35:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:07,089 INFO L481 AbstractCegarLoop]: Abstraction has 4873 states and 7368 transitions. [2020-10-28 18:35:07,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:35:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7368 transitions. [2020-10-28 18:35:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:35:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:07,093 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] [2020-10-28 18:35:07,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:35:07,093 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1522086597, now seen corresponding path program 1 times [2020-10-28 18:35:07,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:07,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973727257] [2020-10-28 18:35:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:07,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:07,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:35:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:08,184 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:08,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:08,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:08,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:08,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:08,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:08,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973727257] [2020-10-28 18:35:08,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:08,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:35:08,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724407752] [2020-10-28 18:35:08,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:35:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:08,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:35:08,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:35:08,230 INFO L87 Difference]: Start difference. First operand 4873 states and 7368 transitions. Second operand 4 states. [2020-10-28 18:35:08,510 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:35:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:09,409 INFO L93 Difference]: Finished difference Result 12033 states and 18206 transitions. [2020-10-28 18:35:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:35:09,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:35:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:09,429 INFO L225 Difference]: With dead ends: 12033 [2020-10-28 18:35:09,429 INFO L226 Difference]: Without dead ends: 7198 [2020-10-28 18:35:09,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:35:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7198 states. [2020-10-28 18:35:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7198 to 7195. [2020-10-28 18:35:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2020-10-28 18:35:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10778 transitions. [2020-10-28 18:35:10,138 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10778 transitions. Word has length 71 [2020-10-28 18:35:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:10,138 INFO L481 AbstractCegarLoop]: Abstraction has 7195 states and 10778 transitions. [2020-10-28 18:35:10,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:35:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10778 transitions. [2020-10-28 18:35:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:35:10,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:10,139 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] [2020-10-28 18:35:10,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:35:10,140 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash -900556964, now seen corresponding path program 1 times [2020-10-28 18:35:10,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:10,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586990386] [2020-10-28 18:35:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:10,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:35:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:11,146 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:11,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:11,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:11,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:11,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586990386] [2020-10-28 18:35:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:11,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:35:11,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347385470] [2020-10-28 18:35:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:35:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:35:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:35:11,196 INFO L87 Difference]: Start difference. First operand 7195 states and 10778 transitions. Second operand 8 states. [2020-10-28 18:35:11,585 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 18:35:12,631 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:35:12,954 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:35:13,271 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:35:13,575 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:35:13,961 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:35:14,264 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:35:14,610 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:35:14,969 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:35:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:16,713 INFO L93 Difference]: Finished difference Result 40665 states and 61070 transitions. [2020-10-28 18:35:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:35:16,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-28 18:35:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:16,802 INFO L225 Difference]: With dead ends: 40665 [2020-10-28 18:35:16,802 INFO L226 Difference]: Without dead ends: 33510 [2020-10-28 18:35:16,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:35:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33510 states. [2020-10-28 18:35:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33510 to 7195. [2020-10-28 18:35:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2020-10-28 18:35:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10682 transitions. [2020-10-28 18:35:17,770 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10682 transitions. Word has length 71 [2020-10-28 18:35:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:17,771 INFO L481 AbstractCegarLoop]: Abstraction has 7195 states and 10682 transitions. [2020-10-28 18:35:17,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:35:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10682 transitions. [2020-10-28 18:35:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:35:17,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:17,772 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] [2020-10-28 18:35:17,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:35:17,772 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2088144342, now seen corresponding path program 1 times [2020-10-28 18:35:17,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:17,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687054330] [2020-10-28 18:35:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:17,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:18,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:35:18,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:35:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:35:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:18,639 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:18,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:18,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:18,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:18,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:18,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:35:18,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687054330] [2020-10-28 18:35:18,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:18,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:35:18,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20924037] [2020-10-28 18:35:18,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:35:18,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:35:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:35:18,721 INFO L87 Difference]: Start difference. First operand 7195 states and 10682 transitions. Second operand 6 states. [2020-10-28 18:35:19,011 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:35:19,844 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:35:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:20,731 INFO L93 Difference]: Finished difference Result 21409 states and 31774 transitions. [2020-10-28 18:35:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:35:20,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 18:35:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:20,767 INFO L225 Difference]: With dead ends: 21409 [2020-10-28 18:35:20,767 INFO L226 Difference]: Without dead ends: 14254 [2020-10-28 18:35:20,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:35:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14254 states. [2020-10-28 18:35:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14254 to 14251. [2020-10-28 18:35:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14251 states. [2020-10-28 18:35:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14251 states to 14251 states and 21034 transitions. [2020-10-28 18:35:22,081 INFO L78 Accepts]: Start accepts. Automaton has 14251 states and 21034 transitions. Word has length 72 [2020-10-28 18:35:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:22,081 INFO L481 AbstractCegarLoop]: Abstraction has 14251 states and 21034 transitions. [2020-10-28 18:35:22,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:35:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14251 states and 21034 transitions. [2020-10-28 18:35:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:35:22,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:22,082 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] [2020-10-28 18:35:22,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:35:22,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -85794095, now seen corresponding path program 1 times [2020-10-28 18:35:22,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:22,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849464562] [2020-10-28 18:35:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:22,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:22,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:22,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:35:22,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:35:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:35:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:22,744 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:22,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:22,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:22,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:35:22,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:22,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:22,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849464562] [2020-10-28 18:35:22,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:35:22,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:35:22,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938546414] [2020-10-28 18:35:22,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:35:22,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:35:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:35:22,797 INFO L87 Difference]: Start difference. First operand 14251 states and 21034 transitions. Second operand 5 states. [2020-10-28 18:35:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:25,379 INFO L93 Difference]: Finished difference Result 25690 states and 37720 transitions. [2020-10-28 18:35:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:35:25,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:35:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:25,426 INFO L225 Difference]: With dead ends: 25690 [2020-10-28 18:35:25,426 INFO L226 Difference]: Without dead ends: 25687 [2020-10-28 18:35:25,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:35:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2020-10-28 18:35:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 14763. [2020-10-28 18:35:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14763 states. [2020-10-28 18:35:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 21482 transitions. [2020-10-28 18:35:27,134 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 21482 transitions. Word has length 72 [2020-10-28 18:35:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:27,135 INFO L481 AbstractCegarLoop]: Abstraction has 14763 states and 21482 transitions. [2020-10-28 18:35:27,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:35:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 21482 transitions. [2020-10-28 18:35:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:35:27,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:27,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:27,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:35:27,140 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:27,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2132641618, now seen corresponding path program 1 times [2020-10-28 18:35:27,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:27,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295375524] [2020-10-28 18:35:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:27,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:27,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:27,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:28,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:29,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:30,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:32,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:35:32,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:35:32,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:32,529 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:32,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:32,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:32,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:32,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:32,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:35:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295375524] [2020-10-28 18:35:32,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:35:32,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:35:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546066075] [2020-10-28 18:35:32,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:35:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:35:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:35:32,568 INFO L87 Difference]: Start difference. First operand 14763 states and 21482 transitions. Second operand 6 states. [2020-10-28 18:35:32,892 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:35:33,896 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:35:34,309 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:35:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:36,267 INFO L93 Difference]: Finished difference Result 41012 states and 60088 transitions. [2020-10-28 18:35:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:35:36,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:35:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:36,312 INFO L225 Difference]: With dead ends: 41012 [2020-10-28 18:35:36,312 INFO L226 Difference]: Without dead ends: 26289 [2020-10-28 18:35:36,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:35:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26289 states. [2020-10-28 18:35:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26289 to 26251. [2020-10-28 18:35:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26251 states. [2020-10-28 18:35:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26251 states to 26251 states and 38282 transitions. [2020-10-28 18:35:38,839 INFO L78 Accepts]: Start accepts. Automaton has 26251 states and 38282 transitions. Word has length 98 [2020-10-28 18:35:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:35:38,839 INFO L481 AbstractCegarLoop]: Abstraction has 26251 states and 38282 transitions. [2020-10-28 18:35:38,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:35:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26251 states and 38282 transitions. [2020-10-28 18:35:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:35:38,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:35:38,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:35:38,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:35:38,845 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:35:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:35:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1362963508, now seen corresponding path program 1 times [2020-10-28 18:35:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:35:38,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108613258] [2020-10-28 18:35:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:35:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:38,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:38,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:38,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:39,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:43,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:43,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:35:43,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:35:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:35:43,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:43,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:35:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:35:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:35:43,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:35:44,199 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:35:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:35:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:35:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:35:44,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:35:44,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:35:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:35:44,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108613258] [2020-10-28 18:35:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:35:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:35:44,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633009404] [2020-10-28 18:35:44,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:35:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:35:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:35:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:35:44,241 INFO L87 Difference]: Start difference. First operand 26251 states and 38282 transitions. Second operand 8 states. [2020-10-28 18:35:44,571 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:35:45,772 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:35:46,122 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:35:46,376 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:35:46,761 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:35:47,059 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:35:47,333 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:35:47,602 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:35:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:35:58,048 INFO L93 Difference]: Finished difference Result 147852 states and 215642 transitions. [2020-10-28 18:35:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:35:58,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:35:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:35:58,244 INFO L225 Difference]: With dead ends: 147852 [2020-10-28 18:35:58,245 INFO L226 Difference]: Without dead ends: 121641 [2020-10-28 18:35:58,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:35:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121641 states. [2020-10-28 18:36:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121641 to 46027. [2020-10-28 18:36:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46027 states. [2020-10-28 18:36:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 67018 transitions. [2020-10-28 18:36:03,906 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 67018 transitions. Word has length 98 [2020-10-28 18:36:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:03,907 INFO L481 AbstractCegarLoop]: Abstraction has 46027 states and 67018 transitions. [2020-10-28 18:36:03,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:36:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 67018 transitions. [2020-10-28 18:36:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:36:03,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:03,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:03,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:36:03,915 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1485057082, now seen corresponding path program 1 times [2020-10-28 18:36:03,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934976822] [2020-10-28 18:36:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:04,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:06,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:08,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:36:08,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:09,259 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:36:09,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:36:09,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:36:09,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 18:36:09,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934976822] [2020-10-28 18:36:09,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:36:09,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:36:09,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123561677] [2020-10-28 18:36:09,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:36:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:36:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:36:09,296 INFO L87 Difference]: Start difference. First operand 46027 states and 67018 transitions. Second operand 8 states. [2020-10-28 18:36:09,642 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:36:10,835 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:36:11,112 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:36:11,541 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:36:11,852 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:36:12,132 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:36:12,450 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:36:12,754 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:36:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:36:26,945 INFO L93 Difference]: Finished difference Result 175278 states and 255092 transitions. [2020-10-28 18:36:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:36:26,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:36:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:36:27,317 INFO L225 Difference]: With dead ends: 175278 [2020-10-28 18:36:27,317 INFO L226 Difference]: Without dead ends: 149067 [2020-10-28 18:36:27,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:36:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149067 states. [2020-10-28 18:36:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149067 to 73195. [2020-10-28 18:36:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73195 states. [2020-10-28 18:36:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73195 states to 73195 states and 106218 transitions. [2020-10-28 18:36:36,466 INFO L78 Accepts]: Start accepts. Automaton has 73195 states and 106218 transitions. Word has length 98 [2020-10-28 18:36:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:36,466 INFO L481 AbstractCegarLoop]: Abstraction has 73195 states and 106218 transitions. [2020-10-28 18:36:36,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:36:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 73195 states and 106218 transitions. [2020-10-28 18:36:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:36:36,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:36,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:36,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:36:36,475 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 748955200, now seen corresponding path program 1 times [2020-10-28 18:36:36,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:36,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585033172] [2020-10-28 18:36:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:37,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:41,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:36:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:36:41,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:41,844 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:36:41,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:41,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:41,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:41,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:41,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:41,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:36:41,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:41,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:36:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:36:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 18:36:41,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585033172] [2020-10-28 18:36:41,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:36:41,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:36:41,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862060206] [2020-10-28 18:36:41,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:36:41,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:36:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:36:41,889 INFO L87 Difference]: Start difference. First operand 73195 states and 106218 transitions. Second operand 8 states. [2020-10-28 18:36:42,241 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:36:43,648 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:36:44,094 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:36:44,387 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:36:44,660 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:36:44,969 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:36:45,256 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:36:45,533 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:37:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:02,728 INFO L93 Difference]: Finished difference Result 195948 states and 285018 transitions. [2020-10-28 18:37:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:37:02,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:37:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:03,051 INFO L225 Difference]: With dead ends: 195948 [2020-10-28 18:37:03,052 INFO L226 Difference]: Without dead ends: 169737 [2020-10-28 18:37:03,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:37:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169737 states. [2020-10-28 18:37:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169737 to 92971. [2020-10-28 18:37:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92971 states. [2020-10-28 18:37:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92971 states to 92971 states and 134954 transitions. [2020-10-28 18:37:14,646 INFO L78 Accepts]: Start accepts. Automaton has 92971 states and 134954 transitions. Word has length 98 [2020-10-28 18:37:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:14,647 INFO L481 AbstractCegarLoop]: Abstraction has 92971 states and 134954 transitions. [2020-10-28 18:37:14,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 92971 states and 134954 transitions. [2020-10-28 18:37:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:37:14,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:14,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:14,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:37:14,655 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:14,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2085554374, now seen corresponding path program 1 times [2020-10-28 18:37:14,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:14,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951919444] [2020-10-28 18:37:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:14,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:15,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:17,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:19,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:19,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:37:19,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:37:19,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:20,024 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:20,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:20,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:37:20,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951919444] [2020-10-28 18:37:20,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:37:20,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:37:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809512710] [2020-10-28 18:37:20,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:20,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:20,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:20,061 INFO L87 Difference]: Start difference. First operand 92971 states and 134954 transitions. Second operand 8 states. [2020-10-28 18:37:20,391 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:37:21,905 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:37:22,184 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:37:22,445 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:37:22,750 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:37:23,016 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:23,352 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:37:23,660 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:37:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:44,533 INFO L93 Difference]: Finished difference Result 217140 states and 315698 transitions. [2020-10-28 18:37:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:37:44,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:37:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:44,977 INFO L225 Difference]: With dead ends: 217140 [2020-10-28 18:37:44,977 INFO L226 Difference]: Without dead ends: 190929 [2020-10-28 18:37:45,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:37:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190929 states.