/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:40:30,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:40:30,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:40:30,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:40:30,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:40:30,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:40:30,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:40:30,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:40:30,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:40:30,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:40:30,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:40:30,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:40:30,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:40:30,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:40:30,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:40:30,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:40:30,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:40:30,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:40:30,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:40:30,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:40:30,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:40:30,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:40:30,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:40:30,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:40:30,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:40:30,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:40:30,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:40:30,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:40:30,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:40:30,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:40:30,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:40:30,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:40:30,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:40:30,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:40:30,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:40:30,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:40:30,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:40:30,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:40:30,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:40:30,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:40:30,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:40:30,128 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 18:40:30,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:40:30,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:40:30,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:40:30,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:40:30,160 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:40:30,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:40:30,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:40:30,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:40:30,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:40:30,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:40:30,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:40:30,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:40:30,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:40:30,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:40:30,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:40:30,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:40:30,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:40:30,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:40:30,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:40:30,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:40:30,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:40:30,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:40:30,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:40:30,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:40:30,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:40:30,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:40:30,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:40:30,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:40:30,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:40:30,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:40:30,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:40:30,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:40:30,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:40:30,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:40:30,561 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:40:30,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:40:30,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abba9104d/319ed62ee3fe46e2a6b533b00aff576c/FLAGe9e1ebfa1 [2020-10-28 18:40:31,298 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:40:31,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:40:31,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abba9104d/319ed62ee3fe46e2a6b533b00aff576c/FLAGe9e1ebfa1 [2020-10-28 18:40:31,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abba9104d/319ed62ee3fe46e2a6b533b00aff576c [2020-10-28 18:40:31,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:40:31,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:40:31,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:40:31,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:40:31,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:40:31,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:40:31" (1/1) ... [2020-10-28 18:40:31,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1313517f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:31, skipping insertion in model container [2020-10-28 18:40:31,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:40:31" (1/1) ... [2020-10-28 18:40:31,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:40:31,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:40:32,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:40:32,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:40:32,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:40:32,172 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:40:32,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32 WrapperNode [2020-10-28 18:40:32,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:40:32,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:40:32,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:40:32,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:40:32,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... [2020-10-28 18:40:32,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:40:32,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:40:32,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:40:32,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:40:32,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:40:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:40:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:40:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:40:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:40:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:40:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:40:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:40:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:40:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:40:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:40:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:40:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:40:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:40:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:40:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:40:33,187 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:40:33,187 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:40:33,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:40:33 BoogieIcfgContainer [2020-10-28 18:40:33,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:40:33,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:40:33,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:40:33,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:40:33,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:40:31" (1/3) ... [2020-10-28 18:40:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2535f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:40:33, skipping insertion in model container [2020-10-28 18:40:33,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:32" (2/3) ... [2020-10-28 18:40:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2535f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:40:33, skipping insertion in model container [2020-10-28 18:40:33,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:40:33" (3/3) ... [2020-10-28 18:40:33,198 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:40:33,210 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:40:33,215 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:40:33,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:40:33,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:40:33,256 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:40:33,256 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:40:33,256 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:40:33,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:40:33,257 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:40:33,257 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:40:33,257 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:40:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-10-28 18:40:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 18:40:33,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:33,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:40:33,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2080328782, now seen corresponding path program 1 times [2020-10-28 18:40:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:33,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338524402] [2020-10-28 18:40:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:34,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:36,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:38,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:38,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 18:40:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:40:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:40:38,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:38,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:40:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:40:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:40:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:40:39,094 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:40:39,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:39,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:39,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:39,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:40:39,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:39,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:40:39,224 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 18:40:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338524402] [2020-10-28 18:40:39,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:40:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:40:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668779005] [2020-10-28 18:40:39,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:40:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:39,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:40:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:40:39,263 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 4 states. [2020-10-28 18:40:39,627 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:40:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:40,547 INFO L93 Difference]: Finished difference Result 273 states and 437 transitions. [2020-10-28 18:40:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:40:40,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 18:40:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:40,562 INFO L225 Difference]: With dead ends: 273 [2020-10-28 18:40:40,562 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 18:40:40,566 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 18:40:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 18:40:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-28 18:40:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 18:40:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 261 transitions. [2020-10-28 18:40:40,633 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 261 transitions. Word has length 78 [2020-10-28 18:40:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:40:40,634 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 261 transitions. [2020-10-28 18:40:40,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:40:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 261 transitions. [2020-10-28 18:40:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:40:40,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:40,638 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 18:40:40,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:40:40,639 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -667170212, now seen corresponding path program 1 times [2020-10-28 18:40:40,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:40,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331461216] [2020-10-28 18:40:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:40,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:41,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:43,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:40:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:40:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:40:45,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:45,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:40:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:40:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:40:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:40:45,996 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:40:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:46,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:46,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:46,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:46,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:40:46,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:46,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:46,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:46,067 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 18:40:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331461216] [2020-10-28 18:40:46,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:40:46,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:40:46,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991968754] [2020-10-28 18:40:46,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:40:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:40:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:40:46,072 INFO L87 Difference]: Start difference. First operand 182 states and 261 transitions. Second operand 4 states. [2020-10-28 18:40:46,371 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:40:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:47,000 INFO L93 Difference]: Finished difference Result 436 states and 663 transitions. [2020-10-28 18:40:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:40:47,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:40:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:47,005 INFO L225 Difference]: With dead ends: 436 [2020-10-28 18:40:47,005 INFO L226 Difference]: Without dead ends: 301 [2020-10-28 18:40:47,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:40:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-28 18:40:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-10-28 18:40:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 18:40:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 445 transitions. [2020-10-28 18:40:47,045 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 445 transitions. Word has length 79 [2020-10-28 18:40:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:40:47,046 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 445 transitions. [2020-10-28 18:40:47,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:40:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 445 transitions. [2020-10-28 18:40:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:40:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:47,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:40:47,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:40:47,049 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 227097505, now seen corresponding path program 1 times [2020-10-28 18:40:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824723147] [2020-10-28 18:40:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:47,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:47,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:51,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:52,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:40:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:40:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:40:52,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:52,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:40:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 18:40:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:40:52,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:40:52,476 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:40:52,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:52,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:52,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:40:52,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:52,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:52,530 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 18:40:52,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824723147] [2020-10-28 18:40:52,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:40:52,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:40:52,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254796509] [2020-10-28 18:40:52,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:40:52,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:40:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:40:52,535 INFO L87 Difference]: Start difference. First operand 298 states and 445 transitions. Second operand 4 states. [2020-10-28 18:40:53,060 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:40:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:53,697 INFO L93 Difference]: Finished difference Result 768 states and 1189 transitions. [2020-10-28 18:40:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:40:53,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:40:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:53,703 INFO L225 Difference]: With dead ends: 768 [2020-10-28 18:40:53,703 INFO L226 Difference]: Without dead ends: 517 [2020-10-28 18:40:53,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:40:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-28 18:40:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 514. [2020-10-28 18:40:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-28 18:40:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 785 transitions. [2020-10-28 18:40:53,778 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 785 transitions. Word has length 80 [2020-10-28 18:40:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:40:53,779 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 785 transitions. [2020-10-28 18:40:53,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:40:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 785 transitions. [2020-10-28 18:40:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:40:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:53,782 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] [2020-10-28 18:40:53,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:40:53,783 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:53,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1093730750, now seen corresponding path program 1 times [2020-10-28 18:40:53,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143021407] [2020-10-28 18:40:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:53,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:54,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:56,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:58,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:58,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:40:58,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:40:58,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:40:58,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:58,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:40:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:40:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:40:58,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:59,270 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:40:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:59,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:59,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:59,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:59,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:40:59,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:59,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:59,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:40:59,370 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 18:40:59,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143021407] [2020-10-28 18:40:59,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:40:59,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:40:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057090224] [2020-10-28 18:40:59,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:40:59,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:40:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:40:59,379 INFO L87 Difference]: Start difference. First operand 514 states and 785 transitions. Second operand 4 states. [2020-10-28 18:40:59,755 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:41:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:00,399 INFO L93 Difference]: Finished difference Result 1384 states and 2157 transitions. [2020-10-28 18:41:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:41:00,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:41:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:00,406 INFO L225 Difference]: With dead ends: 1384 [2020-10-28 18:41:00,406 INFO L226 Difference]: Without dead ends: 917 [2020-10-28 18:41:00,408 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 18:41:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-10-28 18:41:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 914. [2020-10-28 18:41:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2020-10-28 18:41:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1409 transitions. [2020-10-28 18:41:00,465 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1409 transitions. Word has length 81 [2020-10-28 18:41:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:00,465 INFO L481 AbstractCegarLoop]: Abstraction has 914 states and 1409 transitions. [2020-10-28 18:41:00,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:41:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1409 transitions. [2020-10-28 18:41:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:41:00,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:00,467 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 18:41:00,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:41:00,468 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 751581039, now seen corresponding path program 1 times [2020-10-28 18:41:00,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:00,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805465110] [2020-10-28 18:41:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:00,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:01,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:02,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:05,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:05,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:41:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:41:05,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:05,889 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:05,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:05,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:05,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:05,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:05,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:05,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:41:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:05,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:41:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:41:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:41:05,957 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 18:41:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805465110] [2020-10-28 18:41:05,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:05,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:41:05,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301151057] [2020-10-28 18:41:05,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:41:05,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:41:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:41:05,963 INFO L87 Difference]: Start difference. First operand 914 states and 1409 transitions. Second operand 4 states. [2020-10-28 18:41:06,333 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:41:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:07,009 INFO L93 Difference]: Finished difference Result 2520 states and 3925 transitions. [2020-10-28 18:41:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:41:07,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:41:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:07,023 INFO L225 Difference]: With dead ends: 2520 [2020-10-28 18:41:07,023 INFO L226 Difference]: Without dead ends: 1653 [2020-10-28 18:41:07,026 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 18:41:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2020-10-28 18:41:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1650. [2020-10-28 18:41:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1650 states. [2020-10-28 18:41:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2545 transitions. [2020-10-28 18:41:07,137 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2545 transitions. Word has length 82 [2020-10-28 18:41:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:07,141 INFO L481 AbstractCegarLoop]: Abstraction has 1650 states and 2545 transitions. [2020-10-28 18:41:07,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:41:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2545 transitions. [2020-10-28 18:41:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:41:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:07,152 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 18:41:07,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:41:07,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1207344461, now seen corresponding path program 1 times [2020-10-28 18:41:07,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:07,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315478132] [2020-10-28 18:41:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:07,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:08,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:09,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:12,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:12,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:41:12,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:41:12,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:12,573 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:12,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:12,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:12,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:12,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:12,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:12,658 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 18:41:12,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315478132] [2020-10-28 18:41:12,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:12,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:12,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503553711] [2020-10-28 18:41:12,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:12,662 INFO L87 Difference]: Start difference. First operand 1650 states and 2545 transitions. Second operand 6 states. [2020-10-28 18:41:12,999 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:41:13,894 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 18:41:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:14,130 INFO L93 Difference]: Finished difference Result 4840 states and 7509 transitions. [2020-10-28 18:41:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:14,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:41:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:14,154 INFO L225 Difference]: With dead ends: 4840 [2020-10-28 18:41:14,155 INFO L226 Difference]: Without dead ends: 3237 [2020-10-28 18:41:14,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:41:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2020-10-28 18:41:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 3234. [2020-10-28 18:41:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3234 states. [2020-10-28 18:41:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 4993 transitions. [2020-10-28 18:41:14,395 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 4993 transitions. Word has length 83 [2020-10-28 18:41:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:14,395 INFO L481 AbstractCegarLoop]: Abstraction has 3234 states and 4993 transitions. [2020-10-28 18:41:14,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 4993 transitions. [2020-10-28 18:41:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:41:14,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:14,398 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 18:41:14,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:41:14,399 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1819251160, now seen corresponding path program 1 times [2020-10-28 18:41:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:14,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176993838] [2020-10-28 18:41:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:14,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:16,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:19,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:19,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:41:19,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:41:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:41:19,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:19,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:41:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:19,808 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:19,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:19,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:19,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:19,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:19,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:19,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:19,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:41:19,883 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 18:41:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176993838] [2020-10-28 18:41:19,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:19,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:19,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501720389] [2020-10-28 18:41:19,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:19,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:19,889 INFO L87 Difference]: Start difference. First operand 3234 states and 4993 transitions. Second operand 6 states. [2020-10-28 18:41:20,227 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 18:41:21,248 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:41:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:21,693 INFO L93 Difference]: Finished difference Result 9576 states and 14821 transitions. [2020-10-28 18:41:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:21,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:41:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:21,730 INFO L225 Difference]: With dead ends: 9576 [2020-10-28 18:41:21,730 INFO L226 Difference]: Without dead ends: 6389 [2020-10-28 18:41:21,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:41:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6389 states. [2020-10-28 18:41:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6389 to 6386. [2020-10-28 18:41:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6386 states. [2020-10-28 18:41:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9841 transitions. [2020-10-28 18:41:22,232 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9841 transitions. Word has length 83 [2020-10-28 18:41:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:22,232 INFO L481 AbstractCegarLoop]: Abstraction has 6386 states and 9841 transitions. [2020-10-28 18:41:22,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9841 transitions. [2020-10-28 18:41:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:41:22,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:22,234 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 18:41:22,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:41:22,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:22,234 INFO L82 PathProgramCache]: Analyzing trace with hash -88993325, now seen corresponding path program 1 times [2020-10-28 18:41:22,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:22,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113376932] [2020-10-28 18:41:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:22,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:23,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:25,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2996 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:41:25,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:25,647 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:25,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:25,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:25,710 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 18:41:25,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113376932] [2020-10-28 18:41:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218845015] [2020-10-28 18:41:25,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:25,713 INFO L87 Difference]: Start difference. First operand 6386 states and 9841 transitions. Second operand 6 states. [2020-10-28 18:41:26,076 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:41:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:27,106 INFO L93 Difference]: Finished difference Result 12725 states and 19635 transitions. [2020-10-28 18:41:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:41:27,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:41:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:27,147 INFO L225 Difference]: With dead ends: 12725 [2020-10-28 18:41:27,147 INFO L226 Difference]: Without dead ends: 6386 [2020-10-28 18:41:27,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:41:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2020-10-28 18:41:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 6386. [2020-10-28 18:41:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6386 states. [2020-10-28 18:41:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9777 transitions. [2020-10-28 18:41:27,668 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9777 transitions. Word has length 83 [2020-10-28 18:41:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:27,668 INFO L481 AbstractCegarLoop]: Abstraction has 6386 states and 9777 transitions. [2020-10-28 18:41:27,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9777 transitions. [2020-10-28 18:41:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:41:27,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:27,670 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 18:41:27,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:41:27,670 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1769428664, now seen corresponding path program 1 times [2020-10-28 18:41:27,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:27,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093324813] [2020-10-28 18:41:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:41:28,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:28,877 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:28,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:28,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:28,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:28,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:28,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:28,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:28,946 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 18:41:28,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093324813] [2020-10-28 18:41:28,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:28,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:28,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311443533] [2020-10-28 18:41:28,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:28,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:28,949 INFO L87 Difference]: Start difference. First operand 6386 states and 9777 transitions. Second operand 6 states. [2020-10-28 18:41:29,298 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:41:30,409 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 18:41:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:31,141 INFO L93 Difference]: Finished difference Result 19000 states and 29109 transitions. [2020-10-28 18:41:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:31,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:41:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:31,200 INFO L225 Difference]: With dead ends: 19000 [2020-10-28 18:41:31,201 INFO L226 Difference]: Without dead ends: 12661 [2020-10-28 18:41:31,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:41:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2020-10-28 18:41:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 12658. [2020-10-28 18:41:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12658 states. [2020-10-28 18:41:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12658 states to 12658 states and 19313 transitions. [2020-10-28 18:41:32,269 INFO L78 Accepts]: Start accepts. Automaton has 12658 states and 19313 transitions. Word has length 83 [2020-10-28 18:41:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:32,270 INFO L481 AbstractCegarLoop]: Abstraction has 12658 states and 19313 transitions. [2020-10-28 18:41:32,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 12658 states and 19313 transitions. [2020-10-28 18:41:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:41:32,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:32,271 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 18:41:32,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:41:32,271 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash -31303437, now seen corresponding path program 1 times [2020-10-28 18:41:32,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062107984] [2020-10-28 18:41:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:32,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:41:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:41:32,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:41:32,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:33,040 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:33,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:33,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:41:33,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:33,090 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 18:41:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062107984] [2020-10-28 18:41:33,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:33,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:41:33,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390781324] [2020-10-28 18:41:33,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:41:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:41:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:41:33,093 INFO L87 Difference]: Start difference. First operand 12658 states and 19313 transitions. Second operand 9 states. [2020-10-28 18:41:33,516 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:41:34,381 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 18:41:35,453 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:41:35,832 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:41:36,187 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 18:41:36,544 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:41:36,894 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 18:41:37,443 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:41:37,828 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:41:38,191 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 18:41:38,601 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:41:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:45,896 INFO L93 Difference]: Finished difference Result 163990 states and 250505 transitions. [2020-10-28 18:41:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 18:41:45,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-28 18:41:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:46,409 INFO L225 Difference]: With dead ends: 163990 [2020-10-28 18:41:46,409 INFO L226 Difference]: Without dead ends: 151379 [2020-10-28 18:41:46,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:41:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151379 states. [2020-10-28 18:41:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151379 to 25266. [2020-10-28 18:41:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25266 states. [2020-10-28 18:41:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25266 states to 25266 states and 38065 transitions. [2020-10-28 18:41:50,103 INFO L78 Accepts]: Start accepts. Automaton has 25266 states and 38065 transitions. Word has length 83 [2020-10-28 18:41:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:50,103 INFO L481 AbstractCegarLoop]: Abstraction has 25266 states and 38065 transitions. [2020-10-28 18:41:50,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:41:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25266 states and 38065 transitions. [2020-10-28 18:41:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:41:50,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:50,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:41:50,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:41:50,105 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1943685192, now seen corresponding path program 1 times [2020-10-28 18:41:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:50,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562384102] [2020-10-28 18:41:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:50,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:41:50,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:41:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 18:41:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:51,025 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:41:51,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:51,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:41:51,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:51,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:41:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:41:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:51,073 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 18:41:51,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562384102] [2020-10-28 18:41:51,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:51,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:41:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945751671] [2020-10-28 18:41:51,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:41:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:41:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:41:51,080 INFO L87 Difference]: Start difference. First operand 25266 states and 38065 transitions. Second operand 4 states. [2020-10-28 18:41:51,400 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:41:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:55,903 INFO L93 Difference]: Finished difference Result 72888 states and 109237 transitions. [2020-10-28 18:41:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:41:55,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 18:41:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:55,996 INFO L225 Difference]: With dead ends: 72888 [2020-10-28 18:41:55,996 INFO L226 Difference]: Without dead ends: 47669 [2020-10-28 18:41:56,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:41:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47669 states. [2020-10-28 18:42:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47669 to 47154. [2020-10-28 18:42:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47154 states. [2020-10-28 18:42:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47154 states to 47154 states and 69425 transitions. [2020-10-28 18:42:00,537 INFO L78 Accepts]: Start accepts. Automaton has 47154 states and 69425 transitions. Word has length 85 [2020-10-28 18:42:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:00,537 INFO L481 AbstractCegarLoop]: Abstraction has 47154 states and 69425 transitions. [2020-10-28 18:42:00,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:42:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 47154 states and 69425 transitions. [2020-10-28 18:42:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:42:00,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:00,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:42:00,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:42:00,538 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1322155559, now seen corresponding path program 1 times [2020-10-28 18:42:00,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:00,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232991088] [2020-10-28 18:42:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:01,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:01,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:42:01,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-28 18:42:01,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:01,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:01,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:42:01,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:42:01,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 18:42:01,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:01,655 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:42:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:01,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:01,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:01,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:42:01,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:01,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:01,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:01,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:01,714 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 18:42:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232991088] [2020-10-28 18:42:01,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:01,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:42:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255024759] [2020-10-28 18:42:01,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:42:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:42:01,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:42:01,717 INFO L87 Difference]: Start difference. First operand 47154 states and 69425 transitions. Second operand 9 states. [2020-10-28 18:42:02,219 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:42:03,165 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:42:05,017 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:42:05,456 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:42:05,874 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:42:06,260 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:42:06,626 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 18:42:07,683 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:42:08,162 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:42:08,585 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:42:08,981 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:42:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:29,997 INFO L93 Difference]: Finished difference Result 307926 states and 454345 transitions. [2020-10-28 18:42:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 18:42:29,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-28 18:42:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:30,726 INFO L225 Difference]: With dead ends: 307926 [2020-10-28 18:42:30,726 INFO L226 Difference]: Without dead ends: 260819 [2020-10-28 18:42:30,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:42:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260819 states. [2020-10-28 18:42:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260819 to 47154. [2020-10-28 18:42:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47154 states. [2020-10-28 18:42:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47154 states to 47154 states and 68913 transitions. [2020-10-28 18:42:37,681 INFO L78 Accepts]: Start accepts. Automaton has 47154 states and 68913 transitions. Word has length 85 [2020-10-28 18:42:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:37,681 INFO L481 AbstractCegarLoop]: Abstraction has 47154 states and 68913 transitions. [2020-10-28 18:42:37,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:42:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 47154 states and 68913 transitions. [2020-10-28 18:42:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 18:42:37,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:37,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:42:37,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:42:37,683 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:37,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1397258920, now seen corresponding path program 1 times [2020-10-28 18:42:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:37,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142959628] [2020-10-28 18:42:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:37,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:40,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:40,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 18:42:40,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:42:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2538 [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:42:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:40,562 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:42:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:40,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:40,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:40,600 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 18:42:40,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142959628] [2020-10-28 18:42:40,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:40,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:42:40,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362956993] [2020-10-28 18:42:40,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:42:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:42:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:42:40,603 INFO L87 Difference]: Start difference. First operand 47154 states and 68913 transitions. Second operand 4 states. [2020-10-28 18:42:40,928 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 18:42:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:48,750 INFO L93 Difference]: Finished difference Result 92475 states and 136249 transitions. [2020-10-28 18:42:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:42:48,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-28 18:42:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:48,825 INFO L225 Difference]: With dead ends: 92475 [2020-10-28 18:42:48,826 INFO L226 Difference]: Without dead ends: 67255 [2020-10-28 18:42:48,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:42:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67255 states. [2020-10-28 18:42:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67255 to 67252. [2020-10-28 18:42:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67252 states. [2020-10-28 18:42:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67252 states to 67252 states and 97971 transitions. [2020-10-28 18:42:56,404 INFO L78 Accepts]: Start accepts. Automaton has 67252 states and 97971 transitions. Word has length 86 [2020-10-28 18:42:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:56,404 INFO L481 AbstractCegarLoop]: Abstraction has 67252 states and 97971 transitions. [2020-10-28 18:42:56,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:42:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 67252 states and 97971 transitions. [2020-10-28 18:42:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 18:42:56,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:56,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:42:56,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:42:56,405 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:56,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1903450880, now seen corresponding path program 1 times [2020-10-28 18:42:56,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:56,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323002220] [2020-10-28 18:42:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:56,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:56,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 18:42:56,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:42:56,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:56,923 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:42:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:56,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:56,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:56,950 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 18:42:56,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323002220] [2020-10-28 18:42:56,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:56,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:42:56,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888392778] [2020-10-28 18:42:56,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:42:56,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:42:56,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:42:56,952 INFO L87 Difference]: Start difference. First operand 67252 states and 97971 transitions. Second operand 5 states. [2020-10-28 18:43:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:10,975 INFO L93 Difference]: Finished difference Result 121253 states and 176059 transitions. [2020-10-28 18:43:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:43:10,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-28 18:43:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:11,152 INFO L225 Difference]: With dead ends: 121253 [2020-10-28 18:43:11,152 INFO L226 Difference]: Without dead ends: 121250 [2020-10-28 18:43:11,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:43:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121250 states. [2020-10-28 18:43:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121250 to 69300. [2020-10-28 18:43:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69300 states. [2020-10-28 18:43:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69300 states to 69300 states and 99763 transitions. [2020-10-28 18:43:20,272 INFO L78 Accepts]: Start accepts. Automaton has 69300 states and 99763 transitions. Word has length 86 [2020-10-28 18:43:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:20,273 INFO L481 AbstractCegarLoop]: Abstraction has 69300 states and 99763 transitions. [2020-10-28 18:43:20,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:43:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 69300 states and 99763 transitions. [2020-10-28 18:43:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 18:43:20,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:20,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:43:20,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:43:20,288 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2074962194, now seen corresponding path program 1 times [2020-10-28 18:43:20,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:20,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973130571] [2020-10-28 18:43:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:20,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:25,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:25,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:43:25,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 18:43:25,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:43:25,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:25,664 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:43:25,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:25,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:25,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:25,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:25,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:43:25,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:25,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:25,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:25,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:25,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:25,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973130571] [2020-10-28 18:43:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:43:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765839078] [2020-10-28 18:43:25,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:43:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:43:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:43:25,712 INFO L87 Difference]: Start difference. First operand 69300 states and 99763 transitions. Second operand 4 states. [2020-10-28 18:43:28,885 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:43:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:32,323 INFO L93 Difference]: Finished difference Result 116710 states and 168684 transitions. [2020-10-28 18:43:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:43:32,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 18:43:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:32,394 INFO L225 Difference]: With dead ends: 116710 [2020-10-28 18:43:32,394 INFO L226 Difference]: Without dead ends: 47459 [2020-10-28 18:43:32,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 18:43:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47459 states. [2020-10-28 18:43:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47459 to 47456. [2020-10-28 18:43:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47456 states. [2020-10-28 18:43:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47456 states to 47456 states and 68455 transitions. [2020-10-28 18:43:38,383 INFO L78 Accepts]: Start accepts. Automaton has 47456 states and 68455 transitions. Word has length 117 [2020-10-28 18:43:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:38,383 INFO L481 AbstractCegarLoop]: Abstraction has 47456 states and 68455 transitions. [2020-10-28 18:43:38,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:43:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47456 states and 68455 transitions. [2020-10-28 18:43:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 18:43:38,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:38,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:43:38,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:43:38,392 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 717394378, now seen corresponding path program 1 times [2020-10-28 18:43:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:38,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959036683] [2020-10-28 18:43:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:38,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:38,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:38,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:40,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:43,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:43:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:43:43,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:43:43,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:43,799 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 18:43:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:43,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:43,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:43,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:43,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:43,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959036683] [2020-10-28 18:43:43,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:43:43,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:43:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328543367] [2020-10-28 18:43:43,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:43:43,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:43:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:43:43,848 INFO L87 Difference]: Start difference. First operand 47456 states and 68455 transitions. Second operand 6 states. [2020-10-28 18:43:44,290 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 18:43:45,697 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 18:43:46,223 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 18:43:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:57,192 INFO L93 Difference]: Finished difference Result 139113 states and 201581 transitions. [2020-10-28 18:43:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:43:57,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-10-28 18:43:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:57,309 INFO L225 Difference]: With dead ends: 139113 [2020-10-28 18:43:57,309 INFO L226 Difference]: Without dead ends: 91750 [2020-10-28 18:43:57,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:43:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91750 states.