/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:10:32,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:10:32,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:10:32,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:10:32,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:10:32,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:10:32,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:10:32,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:10:32,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:10:32,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:10:32,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:10:32,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:10:32,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:10:32,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:10:32,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:10:32,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:10:32,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:10:32,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:10:32,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:10:32,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:10:32,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:10:32,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:10:32,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:10:32,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:10:32,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:10:32,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:10:32,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:10:32,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:10:32,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:10:32,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:10:32,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:10:32,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:10:32,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:10:32,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:10:32,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:10:32,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:10:32,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:10:32,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:10:32,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:10:32,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:10:32,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:10:32,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:10:32,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:10:32,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:10:32,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:10:32,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:10:32,865 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:10:32,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:10:32,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:10:32,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:10:32,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:10:32,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:10:32,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:10:32,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:10:32,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:10:32,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:10:32,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:10:32,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:10:32,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:10:32,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:10:32,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:10:32,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:10:32,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:10:32,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:32,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:10:32,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:10:32,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:10:32,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:10:32,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:10:32,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:10:32,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:10:32,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:10:33,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:10:33,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:10:33,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:10:33,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:10:33,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:10:33,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:10:33,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edc6553f1/02425fc3d04c4b78b52f8ae3a3ca8de8/FLAGafdd7f32d [2020-10-28 18:10:34,004 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:10:34,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:10:34,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edc6553f1/02425fc3d04c4b78b52f8ae3a3ca8de8/FLAGafdd7f32d [2020-10-28 18:10:34,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edc6553f1/02425fc3d04c4b78b52f8ae3a3ca8de8 [2020-10-28 18:10:34,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:10:34,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:10:34,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:34,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:10:34,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:10:34,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:34" (1/1) ... [2020-10-28 18:10:34,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cfc48e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:34, skipping insertion in model container [2020-10-28 18:10:34,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:34" (1/1) ... [2020-10-28 18:10:34,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:10:34,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:10:34,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:34,866 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:10:34,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:35,026 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:10:35,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35 WrapperNode [2020-10-28 18:10:35,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:35,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:10:35,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:10:35,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:10:35,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... [2020-10-28 18:10:35,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:10:35,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:10:35,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:10:35,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:10:35,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:10:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:10:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:10:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:10:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:10:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:10:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:10:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:10:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:10:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:10:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:10:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:10:36,051 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:10:36,052 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:10:36,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:36 BoogieIcfgContainer [2020-10-28 18:10:36,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:10:36,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:10:36,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:10:36,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:10:36,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:10:34" (1/3) ... [2020-10-28 18:10:36,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220d165c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:36, skipping insertion in model container [2020-10-28 18:10:36,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:35" (2/3) ... [2020-10-28 18:10:36,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220d165c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:36, skipping insertion in model container [2020-10-28 18:10:36,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:36" (3/3) ... [2020-10-28 18:10:36,063 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:10:36,076 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:10:36,082 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:10:36,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:10:36,126 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:10:36,127 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:10:36,127 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:10:36,127 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:10:36,127 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:10:36,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:10:36,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:10:36,128 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:10:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-10-28 18:10:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:10:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:36,162 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] [2020-10-28 18:10:36,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1542310197, now seen corresponding path program 1 times [2020-10-28 18:10:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:36,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777232423] [2020-10-28 18:10:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:39,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:39,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:10:39,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:10:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3401 [2020-10-28 18:10:39,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:39,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:10:39,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:10:39,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:10:39,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:10:40,309 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:40,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:40,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:40,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:40,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:40,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:10:40,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:40,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:40,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:10:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777232423] [2020-10-28 18:10:40,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:40,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:10:40,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9880735] [2020-10-28 18:10:40,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:10:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:10:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:10:40,391 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 4 states. [2020-10-28 18:10:40,745 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:10:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:41,546 INFO L93 Difference]: Finished difference Result 318 states and 531 transitions. [2020-10-28 18:10:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:10:41,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 18:10:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:41,560 INFO L225 Difference]: With dead ends: 318 [2020-10-28 18:10:41,561 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 18:10:41,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 18:10:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2020-10-28 18:10:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 18:10:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 340 transitions. [2020-10-28 18:10:41,643 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 340 transitions. Word has length 61 [2020-10-28 18:10:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:41,644 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 340 transitions. [2020-10-28 18:10:41,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:10:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 340 transitions. [2020-10-28 18:10:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:10:41,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:41,648 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] [2020-10-28 18:10:41,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:10:41,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash -182129794, now seen corresponding path program 1 times [2020-10-28 18:10:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:41,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292732227] [2020-10-28 18:10:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:46,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:10:46,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:10:46,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4468 [2020-10-28 18:10:46,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:46,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:46,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:46,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:10:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:10:46,661 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:46,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:46,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:46,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:46,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:10:46,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:46,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:10:46,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292732227] [2020-10-28 18:10:46,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:46,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627263513] [2020-10-28 18:10:46,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:46,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:46,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:46,730 INFO L87 Difference]: Start difference. First operand 215 states and 340 transitions. Second operand 5 states. [2020-10-28 18:10:47,832 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:47,950 INFO L93 Difference]: Finished difference Result 567 states and 914 transitions. [2020-10-28 18:10:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:47,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-28 18:10:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:47,955 INFO L225 Difference]: With dead ends: 567 [2020-10-28 18:10:47,955 INFO L226 Difference]: Without dead ends: 410 [2020-10-28 18:10:47,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-28 18:10:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 407. [2020-10-28 18:10:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-28 18:10:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 644 transitions. [2020-10-28 18:10:48,001 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 644 transitions. Word has length 63 [2020-10-28 18:10:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:48,002 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 644 transitions. [2020-10-28 18:10:48,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 644 transitions. [2020-10-28 18:10:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:10:48,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:48,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:48,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:10:48,006 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 673165032, now seen corresponding path program 1 times [2020-10-28 18:10:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:48,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855741351] [2020-10-28 18:10:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:49,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:51,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:51,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:10:51,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:10:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3452 [2020-10-28 18:10:51,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:51,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:10:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:51,795 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:51,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:51,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:51,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:51,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:10:51,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:51,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:51,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:10:51,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855741351] [2020-10-28 18:10:51,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:51,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280949653] [2020-10-28 18:10:51,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:51,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:51,854 INFO L87 Difference]: Start difference. First operand 407 states and 644 transitions. Second operand 5 states. [2020-10-28 18:10:52,874 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:53,010 INFO L93 Difference]: Finished difference Result 1134 states and 1790 transitions. [2020-10-28 18:10:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:53,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-28 18:10:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:53,015 INFO L225 Difference]: With dead ends: 1134 [2020-10-28 18:10:53,015 INFO L226 Difference]: Without dead ends: 764 [2020-10-28 18:10:53,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-10-28 18:10:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 761. [2020-10-28 18:10:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-10-28 18:10:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1192 transitions. [2020-10-28 18:10:53,108 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1192 transitions. Word has length 64 [2020-10-28 18:10:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:53,110 INFO L481 AbstractCegarLoop]: Abstraction has 761 states and 1192 transitions. [2020-10-28 18:10:53,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1192 transitions. [2020-10-28 18:10:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:10:53,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:53,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:53,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:10:53,125 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 59908075, now seen corresponding path program 1 times [2020-10-28 18:10:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:53,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478976663] [2020-10-28 18:10:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:53,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:53,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:53,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:53,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:54,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:58,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:10:58,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:10:58,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:10:58,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:58,442 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:58,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:58,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:58,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:58,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:10:58,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478976663] [2020-10-28 18:10:58,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:58,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970979266] [2020-10-28 18:10:58,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:58,497 INFO L87 Difference]: Start difference. First operand 761 states and 1192 transitions. Second operand 5 states. [2020-10-28 18:10:59,359 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:59,483 INFO L93 Difference]: Finished difference Result 2179 states and 3410 transitions. [2020-10-28 18:10:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:59,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-28 18:10:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:59,491 INFO L225 Difference]: With dead ends: 2179 [2020-10-28 18:10:59,492 INFO L226 Difference]: Without dead ends: 1447 [2020-10-28 18:10:59,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2020-10-28 18:10:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1444. [2020-10-28 18:10:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-28 18:10:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2244 transitions. [2020-10-28 18:10:59,609 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2244 transitions. Word has length 65 [2020-10-28 18:10:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:59,609 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2244 transitions. [2020-10-28 18:10:59,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2244 transitions. [2020-10-28 18:10:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:10:59,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:59,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:59,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:10:59,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1924082947, now seen corresponding path program 1 times [2020-10-28 18:10:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:59,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271463675] [2020-10-28 18:10:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:01,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:03,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:03,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:11:03,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:11:03,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4084 [2020-10-28 18:11:03,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:03,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:03,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:03,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 18:11:03,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:11:03,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:04,017 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:04,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:04,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:04,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:04,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:04,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:11:04,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:04,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:04,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:04,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271463675] [2020-10-28 18:11:04,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:04,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:04,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254468384] [2020-10-28 18:11:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:04,078 INFO L87 Difference]: Start difference. First operand 1444 states and 2244 transitions. Second operand 4 states. [2020-10-28 18:11:04,338 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:11:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:05,080 INFO L93 Difference]: Finished difference Result 3578 states and 5800 transitions. [2020-10-28 18:11:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:05,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:11:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:05,095 INFO L225 Difference]: With dead ends: 3578 [2020-10-28 18:11:05,096 INFO L226 Difference]: Without dead ends: 2459 [2020-10-28 18:11:05,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-10-28 18:11:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2440. [2020-10-28 18:11:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-10-28 18:11:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3880 transitions. [2020-10-28 18:11:05,286 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3880 transitions. Word has length 65 [2020-10-28 18:11:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:05,287 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3880 transitions. [2020-10-28 18:11:05,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3880 transitions. [2020-10-28 18:11:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:11:05,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:05,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:05,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:11:05,292 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1786039620, now seen corresponding path program 1 times [2020-10-28 18:11:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:05,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310638126] [2020-10-28 18:11:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:05,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:05,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:06,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4387 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:11:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:10,096 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:10,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:10,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:10,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:10,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:11:10,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:10,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:10,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:10,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:10,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:10,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310638126] [2020-10-28 18:11:10,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:10,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:10,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001449785] [2020-10-28 18:11:10,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:10,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:10,162 INFO L87 Difference]: Start difference. First operand 2440 states and 3880 transitions. Second operand 5 states. [2020-10-28 18:11:11,212 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:11:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:11,582 INFO L93 Difference]: Finished difference Result 6946 states and 11131 transitions. [2020-10-28 18:11:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:11,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:11:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:11,608 INFO L225 Difference]: With dead ends: 6946 [2020-10-28 18:11:11,608 INFO L226 Difference]: Without dead ends: 4694 [2020-10-28 18:11:11,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2020-10-28 18:11:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4691. [2020-10-28 18:11:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-10-28 18:11:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7423 transitions. [2020-10-28 18:11:12,038 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7423 transitions. Word has length 68 [2020-10-28 18:11:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:12,038 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7423 transitions. [2020-10-28 18:11:12,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7423 transitions. [2020-10-28 18:11:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:11:12,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:12,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:12,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:11:12,045 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1733743574, now seen corresponding path program 1 times [2020-10-28 18:11:12,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:12,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501535825] [2020-10-28 18:11:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:12,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:13,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:17,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:17,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:11:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:17,336 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:17,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:17,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:17,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:17,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:11:17,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:17,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:17,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:17,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:17,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:17,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:17,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501535825] [2020-10-28 18:11:17,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:17,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:17,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349003789] [2020-10-28 18:11:17,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:17,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:17,384 INFO L87 Difference]: Start difference. First operand 4691 states and 7423 transitions. Second operand 5 states. [2020-10-28 18:11:18,582 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:11:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:19,078 INFO L93 Difference]: Finished difference Result 13480 states and 21411 transitions. [2020-10-28 18:11:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:19,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:11:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:19,123 INFO L225 Difference]: With dead ends: 13480 [2020-10-28 18:11:19,123 INFO L226 Difference]: Without dead ends: 9005 [2020-10-28 18:11:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2020-10-28 18:11:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 9002. [2020-10-28 18:11:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9002 states. [2020-10-28 18:11:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9002 states to 9002 states and 14115 transitions. [2020-10-28 18:11:19,938 INFO L78 Accepts]: Start accepts. Automaton has 9002 states and 14115 transitions. Word has length 68 [2020-10-28 18:11:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:19,938 INFO L481 AbstractCegarLoop]: Abstraction has 9002 states and 14115 transitions. [2020-10-28 18:11:19,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9002 states and 14115 transitions. [2020-10-28 18:11:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:11:19,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:19,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:19,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:11:19,949 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 374861737, now seen corresponding path program 1 times [2020-10-28 18:11:19,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:19,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427759338] [2020-10-28 18:11:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:20,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:20,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:24,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:24,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:11:24,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:24,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:11:24,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:24,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:11:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 18:11:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:25,216 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:25,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:25,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:25,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:25,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:25,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:11:25,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:25,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:25,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:25,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427759338] [2020-10-28 18:11:25,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:25,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:25,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104918542] [2020-10-28 18:11:25,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:25,255 INFO L87 Difference]: Start difference. First operand 9002 states and 14115 transitions. Second operand 4 states. [2020-10-28 18:11:25,503 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:11:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:27,161 INFO L93 Difference]: Finished difference Result 23664 states and 37991 transitions. [2020-10-28 18:11:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:27,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:11:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:27,227 INFO L225 Difference]: With dead ends: 23664 [2020-10-28 18:11:27,228 INFO L226 Difference]: Without dead ends: 15821 [2020-10-28 18:11:27,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2020-10-28 18:11:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 15690. [2020-10-28 18:11:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15690 states. [2020-10-28 18:11:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15690 states to 15690 states and 24259 transitions. [2020-10-28 18:11:28,834 INFO L78 Accepts]: Start accepts. Automaton has 15690 states and 24259 transitions. Word has length 69 [2020-10-28 18:11:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:28,834 INFO L481 AbstractCegarLoop]: Abstraction has 15690 states and 24259 transitions. [2020-10-28 18:11:28,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15690 states and 24259 transitions. [2020-10-28 18:11:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:11:28,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:28,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:28,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:11:28,848 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -612611848, now seen corresponding path program 1 times [2020-10-28 18:11:28,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:28,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469923740] [2020-10-28 18:11:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:33,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:11:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,135 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:34,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:34,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469923740] [2020-10-28 18:11:34,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:34,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699600122] [2020-10-28 18:11:34,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:34,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:34,182 INFO L87 Difference]: Start difference. First operand 15690 states and 24259 transitions. Second operand 5 states. [2020-10-28 18:11:35,926 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:11:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:37,421 INFO L93 Difference]: Finished difference Result 45572 states and 70558 transitions. [2020-10-28 18:11:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:37,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:11:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:37,493 INFO L225 Difference]: With dead ends: 45572 [2020-10-28 18:11:37,493 INFO L226 Difference]: Without dead ends: 30195 [2020-10-28 18:11:37,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30195 states. [2020-10-28 18:11:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30195 to 30192. [2020-10-28 18:11:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30192 states. [2020-10-28 18:11:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30192 states to 30192 states and 46277 transitions. [2020-10-28 18:11:40,149 INFO L78 Accepts]: Start accepts. Automaton has 30192 states and 46277 transitions. Word has length 72 [2020-10-28 18:11:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:40,149 INFO L481 AbstractCegarLoop]: Abstraction has 30192 states and 46277 transitions. [2020-10-28 18:11:40,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 30192 states and 46277 transitions. [2020-10-28 18:11:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:11:40,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:40,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:40,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:11:40,172 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -809078903, now seen corresponding path program 1 times [2020-10-28 18:11:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:40,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669822847] [2020-10-28 18:11:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:43,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:45,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:45,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:11:45,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:11:45,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:45,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:11:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:11:45,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:45,465 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:45,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:45,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:45,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:45,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:45,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:45,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:45,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:45,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:45,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669822847] [2020-10-28 18:11:45,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:45,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:45,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390123271] [2020-10-28 18:11:45,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:45,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:45,503 INFO L87 Difference]: Start difference. First operand 30192 states and 46277 transitions. Second operand 5 states. [2020-10-28 18:11:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:47,536 INFO L93 Difference]: Finished difference Result 49695 states and 75948 transitions. [2020-10-28 18:11:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:47,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 18:11:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:47,581 INFO L225 Difference]: With dead ends: 49695 [2020-10-28 18:11:47,581 INFO L226 Difference]: Without dead ends: 19606 [2020-10-28 18:11:47,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:11:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19606 states. [2020-10-28 18:11:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19606 to 19606. [2020-10-28 18:11:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19606 states. [2020-10-28 18:11:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19606 states to 19606 states and 29816 transitions. [2020-10-28 18:11:49,252 INFO L78 Accepts]: Start accepts. Automaton has 19606 states and 29816 transitions. Word has length 73 [2020-10-28 18:11:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:49,252 INFO L481 AbstractCegarLoop]: Abstraction has 19606 states and 29816 transitions. [2020-10-28 18:11:49,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 19606 states and 29816 transitions. [2020-10-28 18:11:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:11:49,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:49,264 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] [2020-10-28 18:11:49,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:11:49,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1338563611, now seen corresponding path program 1 times [2020-10-28 18:11:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:49,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093694941] [2020-10-28 18:11:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:11:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:11:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:54,542 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:54,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:54,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:54,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093694941] [2020-10-28 18:11:54,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:54,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208095817] [2020-10-28 18:11:54,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:54,578 INFO L87 Difference]: Start difference. First operand 19606 states and 29816 transitions. Second operand 5 states. [2020-10-28 18:11:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:56,062 INFO L93 Difference]: Finished difference Result 32097 states and 48742 transitions. [2020-10-28 18:11:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:56,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 18:11:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:56,092 INFO L225 Difference]: With dead ends: 32097 [2020-10-28 18:11:56,093 INFO L226 Difference]: Without dead ends: 12713 [2020-10-28 18:11:56,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:11:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12713 states. [2020-10-28 18:11:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12713 to 12711. [2020-10-28 18:11:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12711 states. [2020-10-28 18:11:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12711 states to 12711 states and 19178 transitions. [2020-10-28 18:11:57,487 INFO L78 Accepts]: Start accepts. Automaton has 12711 states and 19178 transitions. Word has length 73 [2020-10-28 18:11:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:57,487 INFO L481 AbstractCegarLoop]: Abstraction has 12711 states and 19178 transitions. [2020-10-28 18:11:57,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 12711 states and 19178 transitions. [2020-10-28 18:11:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 18:11:57,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:57,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:57,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:11:57,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash 260498771, now seen corresponding path program 1 times [2020-10-28 18:11:57,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:57,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572431929] [2020-10-28 18:11:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:57,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:02,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:02,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 18:12:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:12:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:02,788 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:02,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:02,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:02,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572431929] [2020-10-28 18:12:02,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:02,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:02,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95658210] [2020-10-28 18:12:02,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:02,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:02,825 INFO L87 Difference]: Start difference. First operand 12711 states and 19178 transitions. Second operand 5 states. [2020-10-28 18:12:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:04,207 INFO L93 Difference]: Finished difference Result 20836 states and 31440 transitions. [2020-10-28 18:12:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:04,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-28 18:12:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:04,224 INFO L225 Difference]: With dead ends: 20836 [2020-10-28 18:12:04,224 INFO L226 Difference]: Without dead ends: 10839 [2020-10-28 18:12:04,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2020-10-28 18:12:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 10837. [2020-10-28 18:12:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10837 states. [2020-10-28 18:12:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10837 states to 10837 states and 16296 transitions. [2020-10-28 18:12:05,112 INFO L78 Accepts]: Start accepts. Automaton has 10837 states and 16296 transitions. Word has length 75 [2020-10-28 18:12:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 10837 states and 16296 transitions. [2020-10-28 18:12:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10837 states and 16296 transitions. [2020-10-28 18:12:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:12:05,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:05,119 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] [2020-10-28 18:12:05,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:12:05,119 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1657524273, now seen corresponding path program 1 times [2020-10-28 18:12:05,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:05,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036602584] [2020-10-28 18:12:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:05,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:06,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:06,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:10,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:10,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:12:10,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:12:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:12:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:10,398 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:10,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:10,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:10,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:12:10,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:10,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036602584] [2020-10-28 18:12:10,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:10,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153110742] [2020-10-28 18:12:10,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:10,433 INFO L87 Difference]: Start difference. First operand 10837 states and 16296 transitions. Second operand 4 states. [2020-10-28 18:12:10,689 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:12:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:12,415 INFO L93 Difference]: Finished difference Result 21364 states and 32553 transitions. [2020-10-28 18:12:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:12,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:12:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:12,434 INFO L225 Difference]: With dead ends: 21364 [2020-10-28 18:12:12,434 INFO L226 Difference]: Without dead ends: 15945 [2020-10-28 18:12:12,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15945 states. [2020-10-28 18:12:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15945 to 15942. [2020-10-28 18:12:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15942 states. [2020-10-28 18:12:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15942 states to 15942 states and 24009 transitions. [2020-10-28 18:12:13,864 INFO L78 Accepts]: Start accepts. Automaton has 15942 states and 24009 transitions. Word has length 79 [2020-10-28 18:12:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:13,864 INFO L481 AbstractCegarLoop]: Abstraction has 15942 states and 24009 transitions. [2020-10-28 18:12:13,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15942 states and 24009 transitions. [2020-10-28 18:12:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:12:13,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:13,869 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] [2020-10-28 18:12:13,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:12:13,869 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 67165343, now seen corresponding path program 1 times [2020-10-28 18:12:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:13,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703359448] [2020-10-28 18:12:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:13,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:13,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:18,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:19,137 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:19,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703359448] [2020-10-28 18:12:19,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:19,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034769840] [2020-10-28 18:12:19,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:19,166 INFO L87 Difference]: Start difference. First operand 15942 states and 24009 transitions. Second operand 4 states. [2020-10-28 18:12:19,418 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:12:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:21,617 INFO L93 Difference]: Finished difference Result 28502 states and 43629 transitions. [2020-10-28 18:12:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:21,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:12:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:21,647 INFO L225 Difference]: With dead ends: 28502 [2020-10-28 18:12:21,647 INFO L226 Difference]: Without dead ends: 20690 [2020-10-28 18:12:21,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20690 states. [2020-10-28 18:12:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20690 to 20687. [2020-10-28 18:12:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20687 states. [2020-10-28 18:12:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20687 states to 20687 states and 31358 transitions. [2020-10-28 18:12:23,389 INFO L78 Accepts]: Start accepts. Automaton has 20687 states and 31358 transitions. Word has length 79 [2020-10-28 18:12:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:23,389 INFO L481 AbstractCegarLoop]: Abstraction has 20687 states and 31358 transitions. [2020-10-28 18:12:23,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20687 states and 31358 transitions. [2020-10-28 18:12:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:12:23,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:23,393 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] [2020-10-28 18:12:23,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:12:23,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash 57714716, now seen corresponding path program 1 times [2020-10-28 18:12:23,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:23,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430998403] [2020-10-28 18:12:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4352 [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:27,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:12:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 18:12:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:28,007 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:28,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:28,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:28,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:12:28,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:28,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:28,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430998403] [2020-10-28 18:12:28,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:28,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959334254] [2020-10-28 18:12:28,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:28,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:28,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:28,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:28,037 INFO L87 Difference]: Start difference. First operand 20687 states and 31358 transitions. Second operand 4 states. [2020-10-28 18:12:28,293 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:12:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:30,922 INFO L93 Difference]: Finished difference Result 38105 states and 59571 transitions. [2020-10-28 18:12:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:30,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:12:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:30,959 INFO L225 Difference]: With dead ends: 38105 [2020-10-28 18:12:30,960 INFO L226 Difference]: Without dead ends: 27275 [2020-10-28 18:12:30,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27275 states. [2020-10-28 18:12:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27275 to 27272. [2020-10-28 18:12:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27272 states. [2020-10-28 18:12:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27272 states to 27272 states and 42090 transitions. [2020-10-28 18:12:33,069 INFO L78 Accepts]: Start accepts. Automaton has 27272 states and 42090 transitions. Word has length 80 [2020-10-28 18:12:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:33,070 INFO L481 AbstractCegarLoop]: Abstraction has 27272 states and 42090 transitions. [2020-10-28 18:12:33,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27272 states and 42090 transitions. [2020-10-28 18:12:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:12:33,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:33,073 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] [2020-10-28 18:12:33,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:12:33,073 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash -259242297, now seen corresponding path program 1 times [2020-10-28 18:12:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614986318] [2020-10-28 18:12:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:33,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:35,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:35,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:12:35,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2742 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 18:12:35,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:36,117 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:36,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:12:36,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614986318] [2020-10-28 18:12:36,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:36,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002904472] [2020-10-28 18:12:36,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:12:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:12:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:36,179 INFO L87 Difference]: Start difference. First operand 27272 states and 42090 transitions. Second operand 6 states. [2020-10-28 18:12:36,466 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:12:37,652 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:40,844 INFO L93 Difference]: Finished difference Result 67904 states and 105583 transitions. [2020-10-28 18:12:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:12:40,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 18:12:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:40,895 INFO L225 Difference]: With dead ends: 67904 [2020-10-28 18:12:40,895 INFO L226 Difference]: Without dead ends: 41873 [2020-10-28 18:12:40,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:12:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41873 states. [2020-10-28 18:12:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41873 to 41870. [2020-10-28 18:12:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41870 states. [2020-10-28 18:12:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41870 states to 41870 states and 64386 transitions. [2020-10-28 18:12:44,738 INFO L78 Accepts]: Start accepts. Automaton has 41870 states and 64386 transitions. Word has length 82 [2020-10-28 18:12:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:44,739 INFO L481 AbstractCegarLoop]: Abstraction has 41870 states and 64386 transitions. [2020-10-28 18:12:44,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:12:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 41870 states and 64386 transitions. [2020-10-28 18:12:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:12:44,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:44,741 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] [2020-10-28 18:12:44,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:12:44,742 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash -424800212, now seen corresponding path program 1 times [2020-10-28 18:12:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:44,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492431024] [2020-10-28 18:12:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:45,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:12:45,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:46,218 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:46,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:46,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:46,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:12:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:46,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492431024] [2020-10-28 18:12:46,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:46,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:46,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676238698] [2020-10-28 18:12:46,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:12:46,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:46,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:12:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:46,273 INFO L87 Difference]: Start difference. First operand 41870 states and 64386 transitions. Second operand 6 states. [2020-10-28 18:12:46,587 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:12:48,126 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:53,537 INFO L93 Difference]: Finished difference Result 109606 states and 170349 transitions. [2020-10-28 18:12:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:12:53,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 18:12:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:53,637 INFO L225 Difference]: With dead ends: 109606 [2020-10-28 18:12:53,637 INFO L226 Difference]: Without dead ends: 68624 [2020-10-28 18:12:53,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:12:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68624 states. [2020-10-28 18:13:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68624 to 68621. [2020-10-28 18:13:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68621 states. [2020-10-28 18:13:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68621 states to 68621 states and 106085 transitions. [2020-10-28 18:13:00,819 INFO L78 Accepts]: Start accepts. Automaton has 68621 states and 106085 transitions. Word has length 82 [2020-10-28 18:13:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:00,819 INFO L481 AbstractCegarLoop]: Abstraction has 68621 states and 106085 transitions. [2020-10-28 18:13:00,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:13:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 68621 states and 106085 transitions. [2020-10-28 18:13:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:13:00,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:00,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:00,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:13:00,822 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1390252143, now seen corresponding path program 1 times [2020-10-28 18:13:00,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:00,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465838952] [2020-10-28 18:13:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:00,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:00,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:13:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:01,255 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:13:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:01,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:01,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465838952] [2020-10-28 18:13:01,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:01,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:13:01,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15681059] [2020-10-28 18:13:01,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:13:01,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:01,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:13:01,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:01,288 INFO L87 Difference]: Start difference. First operand 68621 states and 106085 transitions. Second operand 6 states. [2020-10-28 18:13:01,561 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:13:04,097 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:13:04,331 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 18:13:06,563 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:13:06,913 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:13:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:33,657 INFO L93 Difference]: Finished difference Result 383541 states and 601136 transitions. [2020-10-28 18:13:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:13:33,657 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 18:13:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:34,272 INFO L225 Difference]: With dead ends: 383541 [2020-10-28 18:13:34,272 INFO L226 Difference]: Without dead ends: 316161 [2020-10-28 18:13:34,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:13:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316161 states. [2020-10-28 18:13:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316161 to 133891. [2020-10-28 18:13:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133891 states. [2020-10-28 18:13:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133891 states to 133891 states and 205341 transitions. [2020-10-28 18:13:50,733 INFO L78 Accepts]: Start accepts. Automaton has 133891 states and 205341 transitions. Word has length 82 [2020-10-28 18:13:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:50,734 INFO L481 AbstractCegarLoop]: Abstraction has 133891 states and 205341 transitions. [2020-10-28 18:13:50,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:13:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 133891 states and 205341 transitions. [2020-10-28 18:13:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:13:50,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:50,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:50,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:13:50,737 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2058381732, now seen corresponding path program 1 times [2020-10-28 18:13:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:50,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679171488] [2020-10-28 18:13:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:51,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:13:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:13:51,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:51,589 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:13:51,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:51,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:51,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:51,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679171488] [2020-10-28 18:13:51,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:51,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289465896] [2020-10-28 18:13:51,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:51,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:51,617 INFO L87 Difference]: Start difference. First operand 133891 states and 205341 transitions. Second operand 5 states. [2020-10-28 18:13:52,061 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:13:54,749 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186