/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:19:44,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:19:44,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:19:44,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:19:44,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:19:44,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:19:44,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:19:44,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:19:44,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:19:44,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:19:44,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:19:44,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:19:44,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:19:44,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:19:44,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:19:44,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:19:44,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:19:44,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:19:44,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:19:44,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:19:44,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:19:44,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:19:44,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:19:44,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:19:44,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:19:44,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:19:44,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:19:44,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:19:44,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:19:44,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:19:44,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:19:44,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:19:44,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:19:44,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:19:44,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:19:44,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:19:44,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:19:44,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:19:44,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:19:44,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:19:44,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:19:44,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:19:44,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:19:44,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:19:44,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:19:44,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:19:44,763 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:19:44,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:19:44,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:19:44,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:19:44,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:19:44,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:19:44,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:19:44,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:19:44,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:19:44,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:19:44,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:19:44,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:19:44,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:19:44,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:19:44,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:19:44,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:19:44,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:19:44,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:44,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:19:44,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:19:44,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:19:44,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:19:44,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:19:44,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:19:44,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:19:44,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:19:45,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:19:45,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:19:45,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:19:45,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:19:45,197 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:19:45,198 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:19:45,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cdec1dd9/6947a11982b2479080a57b6865359cf4/FLAGafad5e6c3 [2020-10-27 05:19:46,092 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:19:46,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:19:46,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cdec1dd9/6947a11982b2479080a57b6865359cf4/FLAGafad5e6c3 [2020-10-27 05:19:46,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cdec1dd9/6947a11982b2479080a57b6865359cf4 [2020-10-27 05:19:46,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:19:46,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:19:46,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:46,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:19:46,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:19:46,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:46" (1/1) ... [2020-10-27 05:19:46,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dae2f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:46, skipping insertion in model container [2020-10-27 05:19:46,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:46" (1/1) ... [2020-10-27 05:19:46,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:19:46,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:19:47,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:47,604 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:19:48,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:48,112 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:19:48,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48 WrapperNode [2020-10-27 05:19:48,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:48,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:19:48,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:19:48,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:19:48,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... [2020-10-27 05:19:48,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:19:48,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:19:48,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:19:48,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:19:48,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:48,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:19:48,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:19:48,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:19:48,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:19:48,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:19:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:19:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:19:48,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:19:48,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:19:48,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:19:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:19:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:19:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:19:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:19:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:19:48,465 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:19:48,465 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:19:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:19:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:19:52,210 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:19:52,211 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:19:52,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:52 BoogieIcfgContainer [2020-10-27 05:19:52,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:19:52,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:19:52,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:19:52,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:19:52,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:19:46" (1/3) ... [2020-10-27 05:19:52,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7da0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:52, skipping insertion in model container [2020-10-27 05:19:52,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:48" (2/3) ... [2020-10-27 05:19:52,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7da0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:52, skipping insertion in model container [2020-10-27 05:19:52,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:52" (3/3) ... [2020-10-27 05:19:52,225 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:19:52,237 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:19:52,243 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:19:52,257 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:19:52,291 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:19:52,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:19:52,292 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:19:52,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:19:52,292 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:19:52,292 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:19:52,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:19:52,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:19:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2020-10-27 05:19:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:19:52,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:52,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:52,359 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1604528589, now seen corresponding path program 1 times [2020-10-27 05:19:52,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143175359] [2020-10-27 05:19:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:53,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:55,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:57,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:19:57,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:19:57,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:19:57,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:19:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:19:57,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:19:58,992 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:19:58,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:59,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:59,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:59,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 05:19:59,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:59,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:59,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:59,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143175359] [2020-10-27 05:19:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128416688] [2020-10-27 05:19:59,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:59,147 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 11 states. [2020-10-27 05:20:00,116 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 05:20:10,943 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:20:12,731 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:20:13,737 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 05:20:14,640 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:20:16,770 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 05:20:17,708 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:20:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:18,013 INFO L93 Difference]: Finished difference Result 3122 states and 5344 transitions. [2020-10-27 05:20:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:20:18,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-27 05:20:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:18,060 INFO L225 Difference]: With dead ends: 3122 [2020-10-27 05:20:18,061 INFO L226 Difference]: Without dead ends: 2539 [2020-10-27 05:20:18,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:20:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2020-10-27 05:20:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1524. [2020-10-27 05:20:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2020-10-27 05:20:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2061 transitions. [2020-10-27 05:20:18,257 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2061 transitions. Word has length 77 [2020-10-27 05:20:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:18,258 INFO L481 AbstractCegarLoop]: Abstraction has 1524 states and 2061 transitions. [2020-10-27 05:20:18,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2061 transitions. [2020-10-27 05:20:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:20:18,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:18,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:18,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:20:18,264 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash -377641865, now seen corresponding path program 1 times [2020-10-27 05:20:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:18,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411028093] [2020-10-27 05:20:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:18,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:22,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:23,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:23,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:20:23,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:20:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:20:23,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:20:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:20:24,460 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:20:24,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:24,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:24,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:24,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:24,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 05:20:24,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:24,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:24,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:24,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:24,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411028093] [2020-10-27 05:20:24,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:24,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:24,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469133159] [2020-10-27 05:20:24,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:24,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:24,620 INFO L87 Difference]: Start difference. First operand 1524 states and 2061 transitions. Second operand 11 states. [2020-10-27 05:20:26,460 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2020-10-27 05:20:35,757 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 351 DAG size of output: 341 [2020-10-27 05:20:38,217 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 343 DAG size of output: 340 [2020-10-27 05:20:39,949 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 348 DAG size of output: 346 [2020-10-27 05:20:40,819 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:20:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:42,503 INFO L93 Difference]: Finished difference Result 3201 states and 4469 transitions. [2020-10-27 05:20:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:20:42,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-27 05:20:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:42,523 INFO L225 Difference]: With dead ends: 3201 [2020-10-27 05:20:42,523 INFO L226 Difference]: Without dead ends: 3016 [2020-10-27 05:20:42,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:20:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-10-27 05:20:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 1518. [2020-10-27 05:20:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-10-27 05:20:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2053 transitions. [2020-10-27 05:20:42,652 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2053 transitions. Word has length 77 [2020-10-27 05:20:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:42,655 INFO L481 AbstractCegarLoop]: Abstraction has 1518 states and 2053 transitions. [2020-10-27 05:20:42,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:20:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2053 transitions. [2020-10-27 05:20:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:20:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:42,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:42,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:20:42,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1130931381, now seen corresponding path program 1 times [2020-10-27 05:20:42,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:42,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698279045] [2020-10-27 05:20:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:42,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:47,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:20:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:48,574 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:20:48,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:48,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:48,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:48,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:48,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698279045] [2020-10-27 05:20:48,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:48,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33334125] [2020-10-27 05:20:48,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:48,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:48,667 INFO L87 Difference]: Start difference. First operand 1518 states and 2053 transitions. Second operand 6 states. [2020-10-27 05:20:49,627 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:20:54,710 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:20:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:55,287 INFO L93 Difference]: Finished difference Result 2208 states and 3023 transitions. [2020-10-27 05:20:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:55,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-27 05:20:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:55,298 INFO L225 Difference]: With dead ends: 2208 [2020-10-27 05:20:55,299 INFO L226 Difference]: Without dead ends: 1643 [2020-10-27 05:20:55,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-10-27 05:20:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1548. [2020-10-27 05:20:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2020-10-27 05:20:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2171 transitions. [2020-10-27 05:20:55,411 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2171 transitions. Word has length 77 [2020-10-27 05:20:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:55,412 INFO L481 AbstractCegarLoop]: Abstraction has 1548 states and 2171 transitions. [2020-10-27 05:20:55,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2171 transitions. [2020-10-27 05:20:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:20:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:55,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:55,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:20:55,416 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash -43921082, now seen corresponding path program 1 times [2020-10-27 05:20:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:55,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003287711] [2020-10-27 05:20:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:55,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:57,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:58,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:00,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:00,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:21:00,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:21:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:21:00,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:21:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:21:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:21:01,562 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:21:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:01,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:01,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:01,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:01,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 05:21:01,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:01,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:21:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003287711] [2020-10-27 05:21:01,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:01,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:21:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145795522] [2020-10-27 05:21:01,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:21:01,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:21:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:21:01,730 INFO L87 Difference]: Start difference. First operand 1548 states and 2171 transitions. Second operand 12 states. [2020-10-27 05:21:03,620 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 347 DAG size of output: 345 [2020-10-27 05:21:11,990 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2020-10-27 05:21:13,217 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-27 05:21:14,067 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:21:16,127 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:21:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:16,180 INFO L93 Difference]: Finished difference Result 2549 states and 3577 transitions. [2020-10-27 05:21:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:21:16,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-27 05:21:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:16,195 INFO L225 Difference]: With dead ends: 2549 [2020-10-27 05:21:16,195 INFO L226 Difference]: Without dead ends: 2518 [2020-10-27 05:21:16,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:21:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2020-10-27 05:21:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1545. [2020-10-27 05:21:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2020-10-27 05:21:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2166 transitions. [2020-10-27 05:21:16,316 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2166 transitions. Word has length 77 [2020-10-27 05:21:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:16,317 INFO L481 AbstractCegarLoop]: Abstraction has 1545 states and 2166 transitions. [2020-10-27 05:21:16,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:21:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2166 transitions. [2020-10-27 05:21:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:21:16,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:16,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:16,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:21:16,321 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 266521583, now seen corresponding path program 1 times [2020-10-27 05:21:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:16,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659978543] [2020-10-27 05:21:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:17,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:21,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:21,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:21:21,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:22,191 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:21:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:22,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:22,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:22,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:21:22,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:22,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:22,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659978543] [2020-10-27 05:21:22,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:22,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:22,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781295492] [2020-10-27 05:21:22,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:22,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:22,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:22,283 INFO L87 Difference]: Start difference. First operand 1545 states and 2166 transitions. Second operand 6 states. [2020-10-27 05:21:23,160 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:21:27,089 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-27 05:21:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:27,614 INFO L93 Difference]: Finished difference Result 2757 states and 3932 transitions. [2020-10-27 05:21:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:27,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-27 05:21:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:27,624 INFO L225 Difference]: With dead ends: 2757 [2020-10-27 05:21:27,624 INFO L226 Difference]: Without dead ends: 1867 [2020-10-27 05:21:27,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2020-10-27 05:21:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1794. [2020-10-27 05:21:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1794 states. [2020-10-27 05:21:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2595 transitions. [2020-10-27 05:21:27,791 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2595 transitions. Word has length 78 [2020-10-27 05:21:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:27,791 INFO L481 AbstractCegarLoop]: Abstraction has 1794 states and 2595 transitions. [2020-10-27 05:21:27,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2595 transitions. [2020-10-27 05:21:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:21:27,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:27,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:27,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:21:27,795 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1839961375, now seen corresponding path program 1 times [2020-10-27 05:21:27,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:27,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330001178] [2020-10-27 05:21:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:32,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:32,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:21:32,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:21:32,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:21:32,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:21:32,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:33,738 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:21:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:33,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:33,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330001178] [2020-10-27 05:21:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:33,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:33,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047517500] [2020-10-27 05:21:33,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:33,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:33,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:33,821 INFO L87 Difference]: Start difference. First operand 1794 states and 2595 transitions. Second operand 6 states. [2020-10-27 05:21:34,675 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:21:38,288 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:21:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:38,859 INFO L93 Difference]: Finished difference Result 4019 states and 5909 transitions. [2020-10-27 05:21:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:38,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-27 05:21:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:38,872 INFO L225 Difference]: With dead ends: 4019 [2020-10-27 05:21:38,872 INFO L226 Difference]: Without dead ends: 2903 [2020-10-27 05:21:38,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2020-10-27 05:21:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2858. [2020-10-27 05:21:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2020-10-27 05:21:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4204 transitions. [2020-10-27 05:21:39,117 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4204 transitions. Word has length 78 [2020-10-27 05:21:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:39,117 INFO L481 AbstractCegarLoop]: Abstraction has 2858 states and 4204 transitions. [2020-10-27 05:21:39,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4204 transitions. [2020-10-27 05:21:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:21:39,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:39,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:39,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:21:39,121 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1094303536, now seen corresponding path program 1 times [2020-10-27 05:21:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:39,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586938850] [2020-10-27 05:21:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:40,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:40,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:21:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:45,018 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:21:45,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:45,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:45,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586938850] [2020-10-27 05:21:45,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:45,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:45,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501219013] [2020-10-27 05:21:45,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:45,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:45,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:45,072 INFO L87 Difference]: Start difference. First operand 2858 states and 4204 transitions. Second operand 6 states. [2020-10-27 05:21:45,940 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:21:48,762 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:21:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:49,488 INFO L93 Difference]: Finished difference Result 6281 states and 9320 transitions. [2020-10-27 05:21:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:49,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 05:21:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:49,507 INFO L225 Difference]: With dead ends: 6281 [2020-10-27 05:21:49,507 INFO L226 Difference]: Without dead ends: 4290 [2020-10-27 05:21:49,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2020-10-27 05:21:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 4239. [2020-10-27 05:21:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2020-10-27 05:21:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6296 transitions. [2020-10-27 05:21:49,953 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6296 transitions. Word has length 79 [2020-10-27 05:21:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:49,954 INFO L481 AbstractCegarLoop]: Abstraction has 4239 states and 6296 transitions. [2020-10-27 05:21:49,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6296 transitions. [2020-10-27 05:21:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:21:49,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:49,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:49,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:21:49,959 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash -373671272, now seen corresponding path program 1 times [2020-10-27 05:21:49,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:49,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928442537] [2020-10-27 05:21:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:53,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:54,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:21:54,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:21:54,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:21:54,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:21:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:21:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:55,946 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:21:55,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:55,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:55,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:55,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:55,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:56,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928442537] [2020-10-27 05:21:56,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:56,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:21:56,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862748144] [2020-10-27 05:21:56,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:21:56,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:21:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:21:56,018 INFO L87 Difference]: Start difference. First operand 4239 states and 6296 transitions. Second operand 12 states. [2020-10-27 05:21:57,874 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2020-10-27 05:22:02,590 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 351 DAG size of output: 350 [2020-10-27 05:22:03,698 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:22:09,487 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2020-10-27 05:22:10,408 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 05:22:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:12,078 INFO L93 Difference]: Finished difference Result 29353 states and 44402 transitions. [2020-10-27 05:22:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:22:12,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-27 05:22:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:12,158 INFO L225 Difference]: With dead ends: 29353 [2020-10-27 05:22:12,159 INFO L226 Difference]: Without dead ends: 26452 [2020-10-27 05:22:12,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:22:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26452 states. [2020-10-27 05:22:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26452 to 4239. [2020-10-27 05:22:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2020-10-27 05:22:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6295 transitions. [2020-10-27 05:22:12,982 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6295 transitions. Word has length 80 [2020-10-27 05:22:12,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:12,982 INFO L481 AbstractCegarLoop]: Abstraction has 4239 states and 6295 transitions. [2020-10-27 05:22:12,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:22:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6295 transitions. [2020-10-27 05:22:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:22:12,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:12,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:12,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:22:12,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1533413419, now seen corresponding path program 1 times [2020-10-27 05:22:12,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:12,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872268663] [2020-10-27 05:22:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:22:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:18,913 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:22:18,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:18,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872268663] [2020-10-27 05:22:18,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:18,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:22:18,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833869501] [2020-10-27 05:22:18,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:22:18,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:22:18,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:22:18,979 INFO L87 Difference]: Start difference. First operand 4239 states and 6295 transitions. Second operand 10 states. [2020-10-27 05:22:19,902 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 05:22:22,993 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-27 05:22:24,000 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-27 05:22:26,557 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-27 05:22:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:27,578 INFO L93 Difference]: Finished difference Result 18752 states and 28597 transitions. [2020-10-27 05:22:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:22:27,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-27 05:22:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:27,606 INFO L225 Difference]: With dead ends: 18752 [2020-10-27 05:22:27,606 INFO L226 Difference]: Without dead ends: 15808 [2020-10-27 05:22:27,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:22:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15808 states. [2020-10-27 05:22:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15808 to 4239. [2020-10-27 05:22:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2020-10-27 05:22:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6293 transitions. [2020-10-27 05:22:28,209 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6293 transitions. Word has length 80 [2020-10-27 05:22:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:28,210 INFO L481 AbstractCegarLoop]: Abstraction has 4239 states and 6293 transitions. [2020-10-27 05:22:28,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:22:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6293 transitions. [2020-10-27 05:22:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:22:28,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:28,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:28,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:22:28,212 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 243379963, now seen corresponding path program 1 times [2020-10-27 05:22:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:28,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391321134] [2020-10-27 05:22:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:29,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:30,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:22:33,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:34,153 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:22:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:34,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:34,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:34,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:22:34,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391321134] [2020-10-27 05:22:34,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:22:34,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367198250] [2020-10-27 05:22:34,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:22:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:22:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:22:34,254 INFO L87 Difference]: Start difference. First operand 4239 states and 6293 transitions. Second operand 10 states. [2020-10-27 05:22:35,202 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 05:22:38,480 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-27 05:22:39,646 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 05:22:43,398 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2020-10-27 05:22:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:45,067 INFO L93 Difference]: Finished difference Result 18720 states and 28544 transitions. [2020-10-27 05:22:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:22:45,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-27 05:22:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:45,095 INFO L225 Difference]: With dead ends: 18720 [2020-10-27 05:22:45,096 INFO L226 Difference]: Without dead ends: 15824 [2020-10-27 05:22:45,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:22:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2020-10-27 05:22:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 4239. [2020-10-27 05:22:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2020-10-27 05:22:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6291 transitions. [2020-10-27 05:22:45,875 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6291 transitions. Word has length 80 [2020-10-27 05:22:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:45,875 INFO L481 AbstractCegarLoop]: Abstraction has 4239 states and 6291 transitions. [2020-10-27 05:22:45,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:22:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6291 transitions. [2020-10-27 05:22:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:22:45,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:45,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:45,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:22:45,878 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash 676557099, now seen corresponding path program 1 times [2020-10-27 05:22:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:45,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669837691] [2020-10-27 05:22:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:46,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:46,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:48,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:49,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:50,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:22:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:50,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:22:50,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:52,017 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:22:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:52,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:52,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:52,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:52,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:22:52,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:52,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669837691] [2020-10-27 05:22:52,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:52,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:22:52,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653787509] [2020-10-27 05:22:52,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:22:52,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:22:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:22:52,087 INFO L87 Difference]: Start difference. First operand 4239 states and 6291 transitions. Second operand 14 states. [2020-10-27 05:22:54,061 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2020-10-27 05:22:59,149 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2020-10-27 05:23:00,368 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-27 05:23:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:03,138 INFO L93 Difference]: Finished difference Result 11590 states and 17532 transitions. [2020-10-27 05:23:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:23:03,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-27 05:23:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:03,150 INFO L225 Difference]: With dead ends: 11590 [2020-10-27 05:23:03,150 INFO L226 Difference]: Without dead ends: 8700 [2020-10-27 05:23:03,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:23:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2020-10-27 05:23:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 4239. [2020-10-27 05:23:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2020-10-27 05:23:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6288 transitions. [2020-10-27 05:23:03,975 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6288 transitions. Word has length 80 [2020-10-27 05:23:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:03,975 INFO L481 AbstractCegarLoop]: Abstraction has 4239 states and 6288 transitions. [2020-10-27 05:23:03,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:23:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6288 transitions. [2020-10-27 05:23:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:23:03,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:03,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:03,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:23:03,982 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash 92443809, now seen corresponding path program 1 times [2020-10-27 05:23:03,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:03,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869390170] [2020-10-27 05:23:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:06,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:08,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:09,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:09,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:23:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:09,902 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:23:09,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:09,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:09,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869390170] [2020-10-27 05:23:09,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:09,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:23:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119830993] [2020-10-27 05:23:09,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:23:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:23:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:23:09,985 INFO L87 Difference]: Start difference. First operand 4239 states and 6288 transitions. Second operand 9 states. [2020-10-27 05:23:10,941 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 05:23:13,913 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:23:14,977 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-27 05:23:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:16,179 INFO L93 Difference]: Finished difference Result 8230 states and 12362 transitions. [2020-10-27 05:23:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:23:16,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-27 05:23:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:16,184 INFO L225 Difference]: With dead ends: 8230 [2020-10-27 05:23:16,185 INFO L226 Difference]: Without dead ends: 4970 [2020-10-27 05:23:16,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:23:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2020-10-27 05:23:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 2738. [2020-10-27 05:23:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2738 states. [2020-10-27 05:23:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 4040 transitions. [2020-10-27 05:23:16,958 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 4040 transitions. Word has length 80 [2020-10-27 05:23:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:16,958 INFO L481 AbstractCegarLoop]: Abstraction has 2738 states and 4040 transitions. [2020-10-27 05:23:16,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:23:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 4040 transitions. [2020-10-27 05:23:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:23:16,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:16,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:16,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:23:16,961 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash 996234918, now seen corresponding path program 1 times [2020-10-27 05:23:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:16,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960300548] [2020-10-27 05:23:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:18,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:18,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:21,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:22,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:23:22,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:22,902 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-27 05:23:22,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:22,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:22,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:22,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:23,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960300548] [2020-10-27 05:23:23,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:23,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:23:23,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422065126] [2020-10-27 05:23:23,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:23:23,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:23:23,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:23:23,020 INFO L87 Difference]: Start difference. First operand 2738 states and 4040 transitions. Second operand 10 states. [2020-10-27 05:23:23,950 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 343