/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=DEEPEST --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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:33:40,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:33:40,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:33:40,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:33:40,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:33:40,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:33:40,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:33:40,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:33:40,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:33:40,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:33:40,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:33:40,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:33:40,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:33:40,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:33:40,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:33:40,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:33:40,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:33:40,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:33:40,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:33:40,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:33:40,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:33:40,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:33:40,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:33:40,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:33:40,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:33:40,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:33:40,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:33:40,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:33:40,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:33:40,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:33:40,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:33:40,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:33:40,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:33:40,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:33:40,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:33:40,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:33:40,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:33:40,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:33:40,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:33:40,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:33:40,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:33:40,215 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 00:33:40,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:33:40,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:33:40,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:33:40,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:33:40,244 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:33:40,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:33:40,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:33:40,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:33:40,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:33:40,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:33:40,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:33:40,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:33:40,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:33:40,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:33:40,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:33:40,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:33:40,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:33:40,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:33:40,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:33:40,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:33:40,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:33:40,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:33:40,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:33:40,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:33:40,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:33:40,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:33:40,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:33:40,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:33:40,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:33:40,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:33:40,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:33:40,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:33:40,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:33:40,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:33:40,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:33:40,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:33:40,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c983b56e/72cc5bc42c3a484484d38c1f7c01606f/FLAGfa351e126 [2020-10-28 00:33:41,496 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:33:41,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:33:41,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c983b56e/72cc5bc42c3a484484d38c1f7c01606f/FLAGfa351e126 [2020-10-28 00:33:41,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c983b56e/72cc5bc42c3a484484d38c1f7c01606f [2020-10-28 00:33:41,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:33:41,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:33:41,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:33:41,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:33:41,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:33:41,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:33:41" (1/1) ... [2020-10-28 00:33:41,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d95165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:41, skipping insertion in model container [2020-10-28 00:33:41,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:33:41" (1/1) ... [2020-10-28 00:33:41,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:33:41,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:33:42,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:33:42,266 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:33:42,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:33:42,534 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:33:42,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42 WrapperNode [2020-10-28 00:33:42,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:33:42,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:33:42,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:33:42,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:33:42,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (1/1) ... [2020-10-28 00:33:42,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:33:42,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:33:42,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:33:42,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:33:42,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (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 00:33:42,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:33:42,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:33:42,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:33:42,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:33:42,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:33:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:33:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:33:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:33:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:33:42,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:33:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:33:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:33:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:33:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:33:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:33:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:33:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:33:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:33:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:33:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:33:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:33:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:33:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:33:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:33:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:33:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:33:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:33:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:33:44,762 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:33:44,763 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:33:44,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:33:44 BoogieIcfgContainer [2020-10-28 00:33:44,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:33:44,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:33:44,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:33:44,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:33:44,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:33:41" (1/3) ... [2020-10-28 00:33:44,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e8aea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:33:44, skipping insertion in model container [2020-10-28 00:33:44,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:42" (2/3) ... [2020-10-28 00:33:44,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e8aea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:33:44, skipping insertion in model container [2020-10-28 00:33:44,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:33:44" (3/3) ... [2020-10-28 00:33:44,776 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:33:44,789 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:33:44,795 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:33:44,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:33:44,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:33:44,843 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:33:44,843 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:33:44,843 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:33:44,843 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:33:44,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:33:44,843 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:33:44,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:33:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states. [2020-10-28 00:33:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 00:33:44,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:33:44,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:44,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:33:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:33:44,899 INFO L82 PathProgramCache]: Analyzing trace with hash -566979542, now seen corresponding path program 1 times [2020-10-28 00:33:44,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:33:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609058462] [2020-10-28 00:33:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:33:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:46,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:47,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:50,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:50,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 00:33:50,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:33:50,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:33:50,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:50,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:33:50,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-28 00:33:50,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:33:50,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:33:51,413 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:33:51,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:33:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:51,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:51,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:51,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:33:51,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:33:51,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 00:33:51,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:33:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:33:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:33:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:33:51,582 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 00:33:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609058462] [2020-10-28 00:33:51,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:33:51,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:33:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974953220] [2020-10-28 00:33:51,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:33:51,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:33:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:33:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:33:51,618 INFO L87 Difference]: Start difference. First operand 351 states. Second operand 7 states. [2020-10-28 00:33:52,494 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 00:33:56,060 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:33:56,802 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:33:57,493 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:33:58,350 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:33:59,091 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:33:59,821 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:00,001 INFO L93 Difference]: Finished difference Result 1559 states and 2652 transitions. [2020-10-28 00:34:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 00:34:00,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-28 00:34:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:00,068 INFO L225 Difference]: With dead ends: 1559 [2020-10-28 00:34:00,068 INFO L226 Difference]: Without dead ends: 1373 [2020-10-28 00:34:00,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:34:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2020-10-28 00:34:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 488. [2020-10-28 00:34:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-28 00:34:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 809 transitions. [2020-10-28 00:34:00,270 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 809 transitions. Word has length 123 [2020-10-28 00:34:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:00,271 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 809 transitions. [2020-10-28 00:34:00,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:34:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 809 transitions. [2020-10-28 00:34:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 00:34:00,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:00,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:00,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:34:00,284 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1846260975, now seen corresponding path program 1 times [2020-10-28 00:34:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:00,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857514734] [2020-10-28 00:34:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:05,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:05,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 00:34:05,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:34:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:34:05,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:34:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 00:34:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:34:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:06,250 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:34:06,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:06,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:06,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:06,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:06,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:06,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:34:06,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:06,340 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 00:34:06,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857514734] [2020-10-28 00:34:06,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:06,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:34:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358831926] [2020-10-28 00:34:06,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:34:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:34:06,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:34:06,355 INFO L87 Difference]: Start difference. First operand 488 states and 809 transitions. Second operand 8 states. [2020-10-28 00:34:07,136 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-28 00:34:10,292 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:34:11,007 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:34:11,746 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:12,422 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:34:13,209 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:34:13,965 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:34:14,651 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:34:15,985 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:34:16,688 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:34:18,063 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:34:18,760 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:18,789 INFO L93 Difference]: Finished difference Result 3576 states and 5998 transitions. [2020-10-28 00:34:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 00:34:18,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-10-28 00:34:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:18,814 INFO L225 Difference]: With dead ends: 3576 [2020-10-28 00:34:18,814 INFO L226 Difference]: Without dead ends: 3285 [2020-10-28 00:34:18,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-28 00:34:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2020-10-28 00:34:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 1277. [2020-10-28 00:34:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-10-28 00:34:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 2138 transitions. [2020-10-28 00:34:18,990 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 2138 transitions. Word has length 124 [2020-10-28 00:34:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:18,992 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 2138 transitions. [2020-10-28 00:34:18,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:34:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 2138 transitions. [2020-10-28 00:34:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 00:34:19,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:19,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:19,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:34:19,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash -511395613, now seen corresponding path program 1 times [2020-10-28 00:34:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:19,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620099242] [2020-10-28 00:34:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:24,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:24,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 00:34:24,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:34:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 00:34:24,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:34:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 00:34:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:34:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:25,014 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:34:25,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:25,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:25,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:25,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:34:25,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:25,094 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 00:34:25,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620099242] [2020-10-28 00:34:25,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:25,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:34:25,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517278122] [2020-10-28 00:34:25,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:34:25,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:25,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:34:25,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:34:25,097 INFO L87 Difference]: Start difference. First operand 1277 states and 2138 transitions. Second operand 5 states. [2020-10-28 00:34:25,843 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:28,967 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:34:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:29,148 INFO L93 Difference]: Finished difference Result 4243 states and 7136 transitions. [2020-10-28 00:34:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:34:29,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-28 00:34:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:29,169 INFO L225 Difference]: With dead ends: 4243 [2020-10-28 00:34:29,173 INFO L226 Difference]: Without dead ends: 3269 [2020-10-28 00:34:29,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:34:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2020-10-28 00:34:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2285. [2020-10-28 00:34:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2285 states. [2020-10-28 00:34:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3834 transitions. [2020-10-28 00:34:29,367 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3834 transitions. Word has length 125 [2020-10-28 00:34:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:29,368 INFO L481 AbstractCegarLoop]: Abstraction has 2285 states and 3834 transitions. [2020-10-28 00:34:29,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:34:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3834 transitions. [2020-10-28 00:34:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 00:34:29,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:29,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:29,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:34:29,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -443007096, now seen corresponding path program 1 times [2020-10-28 00:34:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:29,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995378838] [2020-10-28 00:34:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:34,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:34,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 00:34:34,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:34:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 00:34:34,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:34:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 00:34:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:34:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:35,392 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:34:35,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:35,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:35,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:35,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 00:34:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:34:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995378838] [2020-10-28 00:34:35,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:35,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:34:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545399339] [2020-10-28 00:34:35,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:34:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:34:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:34:35,503 INFO L87 Difference]: Start difference. First operand 2285 states and 3834 transitions. Second operand 5 states. [2020-10-28 00:34:36,229 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:39,157 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:34:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:39,391 INFO L93 Difference]: Finished difference Result 8123 states and 13662 transitions. [2020-10-28 00:34:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:34:39,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-28 00:34:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:39,427 INFO L225 Difference]: With dead ends: 8123 [2020-10-28 00:34:39,427 INFO L226 Difference]: Without dead ends: 6185 [2020-10-28 00:34:39,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:34:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2020-10-28 00:34:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 4230. [2020-10-28 00:34:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4230 states. [2020-10-28 00:34:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 7100 transitions. [2020-10-28 00:34:39,777 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 7100 transitions. Word has length 126 [2020-10-28 00:34:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:39,777 INFO L481 AbstractCegarLoop]: Abstraction has 4230 states and 7100 transitions. [2020-10-28 00:34:39,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:34:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 7100 transitions. [2020-10-28 00:34:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 00:34:39,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:39,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:34:39,782 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1818335644, now seen corresponding path program 1 times [2020-10-28 00:34:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:39,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114770816] [2020-10-28 00:34:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:39,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:40,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:40,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:41,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:44,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 00:34:44,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:34:44,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:45,535 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:34:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:45,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:45,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:45,619 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 00:34:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114770816] [2020-10-28 00:34:45,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:45,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:34:45,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697162379] [2020-10-28 00:34:45,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:34:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:34:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:34:45,627 INFO L87 Difference]: Start difference. First operand 4230 states and 7100 transitions. Second operand 5 states. [2020-10-28 00:34:46,380 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:34:49,244 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:34:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:49,697 INFO L93 Difference]: Finished difference Result 15807 states and 26558 transitions. [2020-10-28 00:34:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:34:49,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 00:34:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:49,764 INFO L225 Difference]: With dead ends: 15807 [2020-10-28 00:34:49,764 INFO L226 Difference]: Without dead ends: 11948 [2020-10-28 00:34:49,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:34:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2020-10-28 00:34:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 8058. [2020-10-28 00:34:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8058 states. [2020-10-28 00:34:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 13512 transitions. [2020-10-28 00:34:50,457 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 13512 transitions. Word has length 127 [2020-10-28 00:34:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:50,458 INFO L481 AbstractCegarLoop]: Abstraction has 8058 states and 13512 transitions. [2020-10-28 00:34:50,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:34:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 13512 transitions. [2020-10-28 00:34:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:34:50,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:50,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:50,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:34:50,462 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:50,463 INFO L82 PathProgramCache]: Analyzing trace with hash 759288336, now seen corresponding path program 1 times [2020-10-28 00:34:50,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:50,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820600679] [2020-10-28 00:34:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:51,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:51,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:52,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:55,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:55,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:34:55,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 00:34:55,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:56,248 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:34:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:56,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:56,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:56,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:56,328 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 00:34:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820600679] [2020-10-28 00:34:56,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:34:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87763412] [2020-10-28 00:34:56,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:34:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:34:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:34:56,334 INFO L87 Difference]: Start difference. First operand 8058 states and 13512 transitions. Second operand 4 states. [2020-10-28 00:34:57,016 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:00,594 INFO L93 Difference]: Finished difference Result 21919 states and 36745 transitions. [2020-10-28 00:35:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:00,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:35:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:00,636 INFO L225 Difference]: With dead ends: 21919 [2020-10-28 00:35:00,637 INFO L226 Difference]: Without dead ends: 14080 [2020-10-28 00:35:00,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2020-10-28 00:35:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 14077. [2020-10-28 00:35:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14077 states. [2020-10-28 00:35:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14077 states to 14077 states and 23527 transitions. [2020-10-28 00:35:01,654 INFO L78 Accepts]: Start accepts. Automaton has 14077 states and 23527 transitions. Word has length 128 [2020-10-28 00:35:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:01,655 INFO L481 AbstractCegarLoop]: Abstraction has 14077 states and 23527 transitions. [2020-10-28 00:35:01,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14077 states and 23527 transitions. [2020-10-28 00:35:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:35:01,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:01,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:35:01,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:35:01,658 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1210362159, now seen corresponding path program 1 times [2020-10-28 00:35:01,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:01,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558265288] [2020-10-28 00:35:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:01,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:01,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:02,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:06,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:06,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:35:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:06,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 00:35:06,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-28 00:35:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:35:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:07,457 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:07,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:07,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:07,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:07,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:07,519 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 00:35:07,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558265288] [2020-10-28 00:35:07,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:07,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:07,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500849291] [2020-10-28 00:35:07,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:07,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:07,522 INFO L87 Difference]: Start difference. First operand 14077 states and 23527 transitions. Second operand 4 states. [2020-10-28 00:35:08,249 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:11,457 INFO L93 Difference]: Finished difference Result 38203 states and 63787 transitions. [2020-10-28 00:35:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:11,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:35:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:11,529 INFO L225 Difference]: With dead ends: 38203 [2020-10-28 00:35:11,530 INFO L226 Difference]: Without dead ends: 24452 [2020-10-28 00:35:11,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24452 states. [2020-10-28 00:35:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24452 to 24397. [2020-10-28 00:35:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24397 states. [2020-10-28 00:35:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24397 states to 24397 states and 40593 transitions. [2020-10-28 00:35:13,174 INFO L78 Accepts]: Start accepts. Automaton has 24397 states and 40593 transitions. Word has length 128 [2020-10-28 00:35:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:13,174 INFO L481 AbstractCegarLoop]: Abstraction has 24397 states and 40593 transitions. [2020-10-28 00:35:13,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24397 states and 40593 transitions. [2020-10-28 00:35:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:35:13,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:13,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:35:13,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:35:13,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1174756090, now seen corresponding path program 1 times [2020-10-28 00:35:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548862971] [2020-10-28 00:35:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:14,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:18,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:35:18,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:35:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:18,929 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:18,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:18,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:18,979 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 00:35:18,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548862971] [2020-10-28 00:35:18,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:18,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:18,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408310720] [2020-10-28 00:35:18,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:18,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:18,982 INFO L87 Difference]: Start difference. First operand 24397 states and 40593 transitions. Second operand 4 states. [2020-10-28 00:35:19,720 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:24,557 INFO L93 Difference]: Finished difference Result 66035 states and 109685 transitions. [2020-10-28 00:35:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:24,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:35:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:24,679 INFO L225 Difference]: With dead ends: 66035 [2020-10-28 00:35:24,679 INFO L226 Difference]: Without dead ends: 41894 [2020-10-28 00:35:24,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41894 states. [2020-10-28 00:35:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41894 to 41865. [2020-10-28 00:35:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41865 states. [2020-10-28 00:35:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41865 states to 41865 states and 69238 transitions. [2020-10-28 00:35:27,046 INFO L78 Accepts]: Start accepts. Automaton has 41865 states and 69238 transitions. Word has length 128 [2020-10-28 00:35:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:27,046 INFO L481 AbstractCegarLoop]: Abstraction has 41865 states and 69238 transitions. [2020-10-28 00:35:27,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41865 states and 69238 transitions. [2020-10-28 00:35:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:35:27,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:27,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:35:27,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:35:27,048 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash -710197743, now seen corresponding path program 1 times [2020-10-28 00:35:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:27,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910344557] [2020-10-28 00:35:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:27,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:27,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:27,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:27,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:32,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:32,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:35:32,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:35:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:32,764 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:32,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:32,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:32,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:32,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:35:32,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:32,820 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 00:35:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910344557] [2020-10-28 00:35:32,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:32,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:32,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639041402] [2020-10-28 00:35:32,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:32,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:32,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:32,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:32,822 INFO L87 Difference]: Start difference. First operand 41865 states and 69238 transitions. Second operand 4 states. [2020-10-28 00:35:33,493 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:39,198 INFO L93 Difference]: Finished difference Result 111919 states and 184570 transitions. [2020-10-28 00:35:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:39,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:35:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:39,376 INFO L225 Difference]: With dead ends: 111919 [2020-10-28 00:35:39,376 INFO L226 Difference]: Without dead ends: 70275 [2020-10-28 00:35:39,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70275 states. [2020-10-28 00:35:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70275 to 70248. [2020-10-28 00:35:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70248 states. [2020-10-28 00:35:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70248 states to 70248 states and 115199 transitions. [2020-10-28 00:35:43,841 INFO L78 Accepts]: Start accepts. Automaton has 70248 states and 115199 transitions. Word has length 128 [2020-10-28 00:35:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:43,842 INFO L481 AbstractCegarLoop]: Abstraction has 70248 states and 115199 transitions. [2020-10-28 00:35:43,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 70248 states and 115199 transitions. [2020-10-28 00:35:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 00:35:43,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:43,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:35:43,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:35:43,844 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 403228684, now seen corresponding path program 1 times [2020-10-28 00:35:43,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:43,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682201523] [2020-10-28 00:35:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:43,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:45,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:48,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:48,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 00:35:48,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:48,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4841 [2020-10-28 00:35:48,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-28 00:35:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:35:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:49,367 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:49,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:49,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:49,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:49,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:49,421 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 00:35:49,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682201523] [2020-10-28 00:35:49,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:49,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:49,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179890371] [2020-10-28 00:35:49,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:49,423 INFO L87 Difference]: Start difference. First operand 70248 states and 115199 transitions. Second operand 4 states. [2020-10-28 00:35:51,639 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:57,968 INFO L93 Difference]: Finished difference Result 180654 states and 294499 transitions. [2020-10-28 00:35:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:57,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-28 00:35:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:58,294 INFO L225 Difference]: With dead ends: 180654 [2020-10-28 00:35:58,294 INFO L226 Difference]: Without dead ends: 110603 [2020-10-28 00:35:58,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110603 states. [2020-10-28 00:36:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110603 to 110600. [2020-10-28 00:36:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110600 states. [2020-10-28 00:36:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110600 states to 110600 states and 177695 transitions. [2020-10-28 00:36:05,137 INFO L78 Accepts]: Start accepts. Automaton has 110600 states and 177695 transitions. Word has length 129 [2020-10-28 00:36:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:05,137 INFO L481 AbstractCegarLoop]: Abstraction has 110600 states and 177695 transitions. [2020-10-28 00:36:05,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 110600 states and 177695 transitions. [2020-10-28 00:36:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 00:36:05,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:05,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:36:05,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:36:05,140 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:05,141 INFO L82 PathProgramCache]: Analyzing trace with hash -212449610, now seen corresponding path program 1 times [2020-10-28 00:36:05,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:05,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682629920] [2020-10-28 00:36:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:06,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:07,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:07,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 00:36:07,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:36:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-28 00:36:07,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 00:36:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:36:07,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:07,648 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:07,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:07,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:07,708 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 00:36:07,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682629920] [2020-10-28 00:36:07,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:07,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:07,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236491692] [2020-10-28 00:36:07,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:07,710 INFO L87 Difference]: Start difference. First operand 110600 states and 177695 transitions. Second operand 4 states. [2020-10-28 00:36:08,364 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:36:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:17,863 INFO L93 Difference]: Finished difference Result 250737 states and 402743 transitions. [2020-10-28 00:36:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:17,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2020-10-28 00:36:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:18,262 INFO L225 Difference]: With dead ends: 250737 [2020-10-28 00:36:18,262 INFO L226 Difference]: Without dead ends: 140334 [2020-10-28 00:36:18,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140334 states. [2020-10-28 00:36:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140334 to 140331. [2020-10-28 00:36:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140331 states. [2020-10-28 00:36:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140331 states to 140331 states and 224979 transitions. [2020-10-28 00:36:27,065 INFO L78 Accepts]: Start accepts. Automaton has 140331 states and 224979 transitions. Word has length 130 [2020-10-28 00:36:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:27,066 INFO L481 AbstractCegarLoop]: Abstraction has 140331 states and 224979 transitions. [2020-10-28 00:36:27,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 140331 states and 224979 transitions. [2020-10-28 00:36:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 00:36:27,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:27,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:36:27,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:36:27,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1969219359, now seen corresponding path program 1 times [2020-10-28 00:36:27,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:27,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419876168] [2020-10-28 00:36:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:32,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:36:32,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:36:32,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:32,789 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:32,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:32,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:32,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:32,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:32,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:32,839 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 00:36:32,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419876168] [2020-10-28 00:36:32,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:32,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:32,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049734046] [2020-10-28 00:36:32,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:32,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:32,841 INFO L87 Difference]: Start difference. First operand 140331 states and 224979 transitions. Second operand 4 states. [2020-10-28 00:36:33,496 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:36:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:44,899 INFO L93 Difference]: Finished difference Result 317883 states and 509519 transitions. [2020-10-28 00:36:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:44,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-10-28 00:36:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:45,253 INFO L225 Difference]: With dead ends: 317883 [2020-10-28 00:36:45,254 INFO L226 Difference]: Without dead ends: 177858 [2020-10-28 00:36:45,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177858 states. [2020-10-28 00:36:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177858 to 177855. [2020-10-28 00:36:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177855 states. [2020-10-28 00:36:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177855 states to 177855 states and 284547 transitions. [2020-10-28 00:36:56,148 INFO L78 Accepts]: Start accepts. Automaton has 177855 states and 284547 transitions. Word has length 133 [2020-10-28 00:36:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:56,149 INFO L481 AbstractCegarLoop]: Abstraction has 177855 states and 284547 transitions. [2020-10-28 00:36:56,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177855 states and 284547 transitions. [2020-10-28 00:36:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 00:36:56,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:56,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:36:56,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:36:56,151 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash -739296517, now seen corresponding path program 1 times [2020-10-28 00:36:56,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:56,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436049535] [2020-10-28 00:36:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:56,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:56,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:01,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 00:37:01,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:37:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 00:37:01,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 00:37:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:37:01,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:01,907 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:37:01,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:01,950 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 00:37:01,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436049535] [2020-10-28 00:37:01,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:01,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:01,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301509548] [2020-10-28 00:37:01,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:01,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:01,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:01,952 INFO L87 Difference]: Start difference. First operand 177855 states and 284547 transitions. Second operand 4 states. [2020-10-28 00:37:02,641 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 294