/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:01:02,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:01:02,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:01:02,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:01:02,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:01:02,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:01:02,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:01:02,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:01:02,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:01:02,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:01:02,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:01:02,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:01:02,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:01:02,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:01:02,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:01:02,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:01:02,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:01:02,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:01:02,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:01:02,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:01:02,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:01:02,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:01:02,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:01:02,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:01:02,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:01:02,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:01:02,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:01:02,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:01:02,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:01:02,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:01:02,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:01:02,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:01:02,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:01:02,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:01:02,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:01:02,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:01:02,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:01:02,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:01:02,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:01:02,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:01:02,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:01:02,847 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 [2020-10-26 20:01:02,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:01:02,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:01:02,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:01:02,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:01:02,915 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:01:02,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:01:02,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:01:02,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:01:02,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:01:02,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:01:02,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:01:02,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:01:02,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:01:02,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:01:02,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:01:02,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:01:02,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:01:02,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:01:02,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:01:02,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:01:02,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:01:02,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:01:02,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:01:02,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:01:02,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:01:02,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:01:02,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:01:02,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:01:02,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:01:02,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:01:03,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:01:03,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:01:03,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:01:03,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:01:03,412 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:01:03,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2020-10-26 20:01:03,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59fc5b99e/d45d612a77084363b0414f4354a3c940/FLAG80e1c2e8d [2020-10-26 20:01:04,191 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:01:04,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/s3_srvr_2a.BV.c.cil.c [2020-10-26 20:01:04,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59fc5b99e/d45d612a77084363b0414f4354a3c940/FLAG80e1c2e8d [2020-10-26 20:01:04,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59fc5b99e/d45d612a77084363b0414f4354a3c940 [2020-10-26 20:01:04,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:01:04,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:01:04,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:01:04,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:01:04,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:01:04,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:01:04" (1/1) ... [2020-10-26 20:01:04,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cf4b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:04, skipping insertion in model container [2020-10-26 20:01:04,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:01:04" (1/1) ... [2020-10-26 20:01:04,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:01:04,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:01:04,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:01:04,925 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:01:05,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:01:05,088 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:01:05,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05 WrapperNode [2020-10-26 20:01:05,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:01:05,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:01:05,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:01:05,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:01:05,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (1/1) ... [2020-10-26 20:01:05,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:01:05,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:01:05,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:01:05,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:01:05,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (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 [2020-10-26 20:01:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:01:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:01:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:01:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-10-26 20:01:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:01:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-26 20:01:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:01:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:01:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:01:05,560 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-26 20:01:06,319 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-26 20:01:06,319 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-26 20:01:06,349 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:01:06,350 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:01:06,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:01:06 BoogieIcfgContainer [2020-10-26 20:01:06,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:01:06,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:01:06,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:01:06,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:01:06,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:01:04" (1/3) ... [2020-10-26 20:01:06,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24eb7953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:01:06, skipping insertion in model container [2020-10-26 20:01:06,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:01:05" (2/3) ... [2020-10-26 20:01:06,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24eb7953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:01:06, skipping insertion in model container [2020-10-26 20:01:06,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:01:06" (3/3) ... [2020-10-26 20:01:06,373 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_2a.BV.c.cil.c [2020-10-26 20:01:06,403 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:01:06,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:01:06,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:01:06,473 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:01:06,473 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:01:06,474 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:01:06,474 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:01:06,474 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:01:06,474 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:01:06,474 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:01:06,474 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:01:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-10-26 20:01:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 20:01:06,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:06,508 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] [2020-10-26 20:01:06,509 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2139538990, now seen corresponding path program 1 times [2020-10-26 20:01:06,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:06,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446668617] [2020-10-26 20:01:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:07,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 20:01:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-26 20:01:07,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:07,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:07,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:07,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:01:07,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:01:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:07,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:07,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:01:07,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:07,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446668617] [2020-10-26 20:01:07,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:07,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:01:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89742879] [2020-10-26 20:01:07,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:07,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:07,822 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 6 states. [2020-10-26 20:01:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:09,323 INFO L93 Difference]: Finished difference Result 331 states and 564 transitions. [2020-10-26 20:01:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:09,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-26 20:01:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:09,338 INFO L225 Difference]: With dead ends: 331 [2020-10-26 20:01:09,338 INFO L226 Difference]: Without dead ends: 167 [2020-10-26 20:01:09,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:01:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-26 20:01:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-10-26 20:01:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-26 20:01:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 255 transitions. [2020-10-26 20:01:09,410 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 255 transitions. Word has length 51 [2020-10-26 20:01:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:09,410 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 255 transitions. [2020-10-26 20:01:09,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 255 transitions. [2020-10-26 20:01:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 20:01:09,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:09,414 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] [2020-10-26 20:01:09,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:01:09,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1683086567, now seen corresponding path program 1 times [2020-10-26 20:01:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628663632] [2020-10-26 20:01:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:09,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:10,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:10,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 20:01:10,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-26 20:01:10,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:10,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:01:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:01:10,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:10,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:10,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:10,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:10,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:01:10,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628663632] [2020-10-26 20:01:10,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:10,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:01:10,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087111067] [2020-10-26 20:01:10,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:10,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:10,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:10,271 INFO L87 Difference]: Start difference. First operand 163 states and 255 transitions. Second operand 6 states. [2020-10-26 20:01:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:11,067 INFO L93 Difference]: Finished difference Result 326 states and 511 transitions. [2020-10-26 20:01:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:11,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-26 20:01:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:11,071 INFO L225 Difference]: With dead ends: 326 [2020-10-26 20:01:11,071 INFO L226 Difference]: Without dead ends: 177 [2020-10-26 20:01:11,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:01:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-26 20:01:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-26 20:01:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 20:01:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2020-10-26 20:01:11,095 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 52 [2020-10-26 20:01:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:11,095 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2020-10-26 20:01:11,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2020-10-26 20:01:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 20:01:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:11,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:01:11,099 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1492737295, now seen corresponding path program 1 times [2020-10-26 20:01:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:11,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494756740] [2020-10-26 20:01:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-26 20:01:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:01:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:11,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:11,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:11,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:11,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:11,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:11,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:11,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:11,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:11,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:11,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494756740] [2020-10-26 20:01:11,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:11,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:11,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108475144] [2020-10-26 20:01:11,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:11,353 INFO L87 Difference]: Start difference. First operand 174 states and 266 transitions. Second operand 4 states. [2020-10-26 20:01:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:11,803 INFO L93 Difference]: Finished difference Result 469 states and 738 transitions. [2020-10-26 20:01:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:11,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-26 20:01:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:11,807 INFO L225 Difference]: With dead ends: 469 [2020-10-26 20:01:11,808 INFO L226 Difference]: Without dead ends: 320 [2020-10-26 20:01:11,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-26 20:01:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-10-26 20:01:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-26 20:01:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 498 transitions. [2020-10-26 20:01:11,842 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 498 transitions. Word has length 67 [2020-10-26 20:01:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:11,842 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 498 transitions. [2020-10-26 20:01:11,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 498 transitions. [2020-10-26 20:01:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 20:01:11,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:11,847 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:11,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:01:11,847 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:11,848 INFO L82 PathProgramCache]: Analyzing trace with hash -473005025, now seen corresponding path program 1 times [2020-10-26 20:01:11,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:11,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858468794] [2020-10-26 20:01:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:12,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 20:01:12,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-26 20:01:12,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-26 20:01:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:01:12,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:12,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:12,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:12,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:01:12,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:01:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858468794] [2020-10-26 20:01:12,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:12,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:12,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041702413] [2020-10-26 20:01:12,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:12,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:12,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:12,252 INFO L87 Difference]: Start difference. First operand 320 states and 498 transitions. Second operand 4 states. [2020-10-26 20:01:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:12,680 INFO L93 Difference]: Finished difference Result 761 states and 1202 transitions. [2020-10-26 20:01:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:12,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-26 20:01:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:12,685 INFO L225 Difference]: With dead ends: 761 [2020-10-26 20:01:12,685 INFO L226 Difference]: Without dead ends: 466 [2020-10-26 20:01:12,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-26 20:01:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-10-26 20:01:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-26 20:01:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 731 transitions. [2020-10-26 20:01:12,721 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 731 transitions. Word has length 89 [2020-10-26 20:01:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:12,722 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 731 transitions. [2020-10-26 20:01:12,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 731 transitions. [2020-10-26 20:01:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 20:01:12,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:12,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:12,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:01:12,734 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1471882461, now seen corresponding path program 1 times [2020-10-26 20:01:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799566947] [2020-10-26 20:01:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:12,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-26 20:01:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:01:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 20:01:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799566947] [2020-10-26 20:01:13,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:13,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:13,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363944851] [2020-10-26 20:01:13,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:13,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:13,096 INFO L87 Difference]: Start difference. First operand 466 states and 731 transitions. Second operand 4 states. [2020-10-26 20:01:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:13,530 INFO L93 Difference]: Finished difference Result 615 states and 968 transitions. [2020-10-26 20:01:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:13,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-26 20:01:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:13,537 INFO L225 Difference]: With dead ends: 615 [2020-10-26 20:01:13,537 INFO L226 Difference]: Without dead ends: 612 [2020-10-26 20:01:13,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-26 20:01:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2020-10-26 20:01:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-10-26 20:01:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 965 transitions. [2020-10-26 20:01:13,580 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 965 transitions. Word has length 128 [2020-10-26 20:01:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:13,582 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 965 transitions. [2020-10-26 20:01:13,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 965 transitions. [2020-10-26 20:01:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-26 20:01:13,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:13,586 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:13,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:01:13,586 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:13,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1633966217, now seen corresponding path program 1 times [2020-10-26 20:01:13,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:13,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581137927] [2020-10-26 20:01:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:13,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-26 20:01:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:01:13,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:13,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:14,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:14,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 20:01:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581137927] [2020-10-26 20:01:14,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:14,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:14,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255949197] [2020-10-26 20:01:14,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:14,034 INFO L87 Difference]: Start difference. First operand 612 states and 965 transitions. Second operand 4 states. [2020-10-26 20:01:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:14,599 INFO L93 Difference]: Finished difference Result 1371 states and 2205 transitions. [2020-10-26 20:01:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:14,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-26 20:01:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:14,605 INFO L225 Difference]: With dead ends: 1371 [2020-10-26 20:01:14,605 INFO L226 Difference]: Without dead ends: 784 [2020-10-26 20:01:14,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-26 20:01:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 776. [2020-10-26 20:01:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-10-26 20:01:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1149 transitions. [2020-10-26 20:01:14,647 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1149 transitions. Word has length 151 [2020-10-26 20:01:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:14,648 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1149 transitions. [2020-10-26 20:01:14,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1149 transitions. [2020-10-26 20:01:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:01:14,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:14,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:14,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:01:14,652 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1445859277, now seen corresponding path program 1 times [2020-10-26 20:01:14,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:14,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575388124] [2020-10-26 20:01:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:14,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:14,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:15,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:15,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:01:15,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:15,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-26 20:01:15,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:15,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:15,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:15,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:01:15,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:15,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:15,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:15,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:15,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:15,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:15,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:15,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:15,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-26 20:01:15,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575388124] [2020-10-26 20:01:15,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:15,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070883228] [2020-10-26 20:01:15,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:15,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:15,538 INFO L87 Difference]: Start difference. First operand 776 states and 1149 transitions. Second operand 4 states. [2020-10-26 20:01:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:16,037 INFO L93 Difference]: Finished difference Result 2276 states and 3388 transitions. [2020-10-26 20:01:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:16,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 193 [2020-10-26 20:01:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:16,048 INFO L225 Difference]: With dead ends: 2276 [2020-10-26 20:01:16,048 INFO L226 Difference]: Without dead ends: 1525 [2020-10-26 20:01:16,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2020-10-26 20:01:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1524. [2020-10-26 20:01:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2020-10-26 20:01:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2255 transitions. [2020-10-26 20:01:16,130 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2255 transitions. Word has length 193 [2020-10-26 20:01:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:16,130 INFO L481 AbstractCegarLoop]: Abstraction has 1524 states and 2255 transitions. [2020-10-26 20:01:16,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2255 transitions. [2020-10-26 20:01:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:01:16,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:16,137 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:16,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:01:16,137 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -713891851, now seen corresponding path program 1 times [2020-10-26 20:01:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:16,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148480094] [2020-10-26 20:01:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:16,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:01:16,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-26 20:01:16,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-26 20:01:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:01:16,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:16,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:16,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:16,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:16,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:16,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 20:01:16,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148480094] [2020-10-26 20:01:16,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:16,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164173750] [2020-10-26 20:01:16,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:16,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:16,569 INFO L87 Difference]: Start difference. First operand 1524 states and 2255 transitions. Second operand 4 states. [2020-10-26 20:01:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:17,165 INFO L93 Difference]: Finished difference Result 3367 states and 5081 transitions. [2020-10-26 20:01:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:17,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 193 [2020-10-26 20:01:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:17,175 INFO L225 Difference]: With dead ends: 3367 [2020-10-26 20:01:17,176 INFO L226 Difference]: Without dead ends: 1772 [2020-10-26 20:01:17,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-10-26 20:01:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1772. [2020-10-26 20:01:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1772 states. [2020-10-26 20:01:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2543 transitions. [2020-10-26 20:01:17,267 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2543 transitions. Word has length 193 [2020-10-26 20:01:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:17,267 INFO L481 AbstractCegarLoop]: Abstraction has 1772 states and 2543 transitions. [2020-10-26 20:01:17,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2543 transitions. [2020-10-26 20:01:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:17,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:17,274 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:17,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:01:17,275 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash 118181392, now seen corresponding path program 1 times [2020-10-26 20:01:17,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:17,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305416602] [2020-10-26 20:01:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:17,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:17,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:01:17,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-26 20:01:17,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:01:17,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-26 20:01:17,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:01:17,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:17,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:17,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:17,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 286 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 20:01:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305416602] [2020-10-26 20:01:17,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:17,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:01:17,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319435945] [2020-10-26 20:01:17,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:01:17,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:17,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:01:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:17,931 INFO L87 Difference]: Start difference. First operand 1772 states and 2543 transitions. Second operand 5 states. [2020-10-26 20:01:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:19,121 INFO L93 Difference]: Finished difference Result 4396 states and 6378 transitions. [2020-10-26 20:01:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:01:19,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-10-26 20:01:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:19,132 INFO L225 Difference]: With dead ends: 4396 [2020-10-26 20:01:19,132 INFO L226 Difference]: Without dead ends: 1669 [2020-10-26 20:01:19,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:01:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-10-26 20:01:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1538. [2020-10-26 20:01:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2020-10-26 20:01:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2111 transitions. [2020-10-26 20:01:19,216 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2111 transitions. Word has length 221 [2020-10-26 20:01:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:19,216 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2111 transitions. [2020-10-26 20:01:19,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:01:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2111 transitions. [2020-10-26 20:01:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:19,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:19,222 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:19,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:01:19,222 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash -895018740, now seen corresponding path program 1 times [2020-10-26 20:01:19,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:19,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202949948] [2020-10-26 20:01:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:19,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:20,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:20,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 20:01:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:20,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:20,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:20,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:20,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:20,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:20,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:20,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-26 20:01:20,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202949948] [2020-10-26 20:01:20,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:20,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:20,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516980714] [2020-10-26 20:01:20,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:20,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:20,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:20,524 INFO L87 Difference]: Start difference. First operand 1538 states and 2111 transitions. Second operand 4 states. [2020-10-26 20:01:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:20,973 INFO L93 Difference]: Finished difference Result 1795 states and 2465 transitions. [2020-10-26 20:01:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:20,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-10-26 20:01:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:20,980 INFO L225 Difference]: With dead ends: 1795 [2020-10-26 20:01:20,981 INFO L226 Difference]: Without dead ends: 1302 [2020-10-26 20:01:20,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-10-26 20:01:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1048. [2020-10-26 20:01:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2020-10-26 20:01:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1449 transitions. [2020-10-26 20:01:21,040 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1449 transitions. Word has length 221 [2020-10-26 20:01:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:21,041 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1449 transitions. [2020-10-26 20:01:21,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1449 transitions. [2020-10-26 20:01:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:01:21,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:21,046 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:21,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:01:21,047 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1350560714, now seen corresponding path program 1 times [2020-10-26 20:01:21,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:21,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036064521] [2020-10-26 20:01:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:22,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:01:22,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:22,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-26 20:01:22,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:22,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:22,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-26 20:01:22,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:01:22,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:22,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:22,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:22,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:22,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:22,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:22,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:22,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:22,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-26 20:01:22,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036064521] [2020-10-26 20:01:22,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:22,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501802872] [2020-10-26 20:01:22,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:22,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:22,316 INFO L87 Difference]: Start difference. First operand 1048 states and 1449 transitions. Second operand 4 states. [2020-10-26 20:01:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:22,868 INFO L93 Difference]: Finished difference Result 2255 states and 3185 transitions. [2020-10-26 20:01:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:22,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-10-26 20:01:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:22,877 INFO L225 Difference]: With dead ends: 2255 [2020-10-26 20:01:22,877 INFO L226 Difference]: Without dead ends: 1184 [2020-10-26 20:01:22,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2020-10-26 20:01:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1140. [2020-10-26 20:01:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1140 states. [2020-10-26 20:01:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1597 transitions. [2020-10-26 20:01:22,938 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1597 transitions. Word has length 221 [2020-10-26 20:01:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:22,938 INFO L481 AbstractCegarLoop]: Abstraction has 1140 states and 1597 transitions. [2020-10-26 20:01:22,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1597 transitions. [2020-10-26 20:01:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 20:01:22,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:22,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:22,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:01:22,945 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1077966287, now seen corresponding path program 1 times [2020-10-26 20:01:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:22,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735375366] [2020-10-26 20:01:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:27,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:27,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:27,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 20:01:27,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-26 20:01:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:28,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:28,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:28,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:28,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:28,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:28,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:28,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 146 proven. 196 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-26 20:01:28,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735375366] [2020-10-26 20:01:28,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:28,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:28,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390021528] [2020-10-26 20:01:28,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:28,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:28,667 INFO L87 Difference]: Start difference. First operand 1140 states and 1597 transitions. Second operand 6 states. [2020-10-26 20:01:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:30,741 INFO L93 Difference]: Finished difference Result 3869 states and 5497 transitions. [2020-10-26 20:01:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:01:30,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 252 [2020-10-26 20:01:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:30,756 INFO L225 Difference]: With dead ends: 3869 [2020-10-26 20:01:30,756 INFO L226 Difference]: Without dead ends: 2750 [2020-10-26 20:01:30,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:01:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-26 20:01:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2504. [2020-10-26 20:01:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2504 states. [2020-10-26 20:01:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 3515 transitions. [2020-10-26 20:01:30,913 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 3515 transitions. Word has length 252 [2020-10-26 20:01:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:30,914 INFO L481 AbstractCegarLoop]: Abstraction has 2504 states and 3515 transitions. [2020-10-26 20:01:30,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 3515 transitions. [2020-10-26 20:01:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:01:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:30,922 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:30,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:01:30,923 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1183006630, now seen corresponding path program 1 times [2020-10-26 20:01:30,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:30,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856663065] [2020-10-26 20:01:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:31,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-26 20:01:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:01:31,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:32,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:32,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:32,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:32,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:01:32,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:32,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:32,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 20:01:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856663065] [2020-10-26 20:01:32,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252679396] [2020-10-26 20:01:32,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:32,143 INFO L87 Difference]: Start difference. First operand 2504 states and 3515 transitions. Second operand 4 states. [2020-10-26 20:01:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:32,790 INFO L93 Difference]: Finished difference Result 5423 states and 7761 transitions. [2020-10-26 20:01:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:32,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-10-26 20:01:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:32,809 INFO L225 Difference]: With dead ends: 5423 [2020-10-26 20:01:32,809 INFO L226 Difference]: Without dead ends: 2848 [2020-10-26 20:01:32,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2020-10-26 20:01:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2704. [2020-10-26 20:01:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-26 20:01:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3843 transitions. [2020-10-26 20:01:32,965 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3843 transitions. Word has length 261 [2020-10-26 20:01:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:32,965 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3843 transitions. [2020-10-26 20:01:32,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3843 transitions. [2020-10-26 20:01:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:01:32,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:32,977 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:32,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:01:32,978 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1406817503, now seen corresponding path program 1 times [2020-10-26 20:01:32,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:32,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700828135] [2020-10-26 20:01:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:33,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:38,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 20:01:38,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:38,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 20:01:38,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:38,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:38,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:01:38,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 20:01:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:38,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:38,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:38,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:38,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 421 proven. 76 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-10-26 20:01:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700828135] [2020-10-26 20:01:38,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:38,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659887164] [2020-10-26 20:01:38,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:38,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:38,568 INFO L87 Difference]: Start difference. First operand 2704 states and 3843 transitions. Second operand 6 states. [2020-10-26 20:01:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:40,794 INFO L93 Difference]: Finished difference Result 7213 states and 10303 transitions. [2020-10-26 20:01:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:01:40,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 272 [2020-10-26 20:01:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:40,818 INFO L225 Difference]: With dead ends: 7213 [2020-10-26 20:01:40,818 INFO L226 Difference]: Without dead ends: 4534 [2020-10-26 20:01:40,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:01:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2020-10-26 20:01:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 4192. [2020-10-26 20:01:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4192 states. [2020-10-26 20:01:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 5909 transitions. [2020-10-26 20:01:41,072 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 5909 transitions. Word has length 272 [2020-10-26 20:01:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:41,072 INFO L481 AbstractCegarLoop]: Abstraction has 4192 states and 5909 transitions. [2020-10-26 20:01:41,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 5909 transitions. [2020-10-26 20:01:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:41,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:41,087 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:41,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:01:41,087 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash -573746734, now seen corresponding path program 1 times [2020-10-26 20:01:41,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:41,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860809386] [2020-10-26 20:01:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:42,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:44,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:44,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:44,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:01:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2929 [2020-10-26 20:01:44,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-26 20:01:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:01:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:44,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:44,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:44,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:44,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:44,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:44,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:44,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-10-26 20:01:44,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860809386] [2020-10-26 20:01:44,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:44,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705617741] [2020-10-26 20:01:44,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:44,187 INFO L87 Difference]: Start difference. First operand 4192 states and 5909 transitions. Second operand 4 states. [2020-10-26 20:01:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:44,928 INFO L93 Difference]: Finished difference Result 12452 states and 17524 transitions. [2020-10-26 20:01:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:44,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:44,970 INFO L225 Difference]: With dead ends: 12452 [2020-10-26 20:01:44,970 INFO L226 Difference]: Without dead ends: 8285 [2020-10-26 20:01:44,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2020-10-26 20:01:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 4204. [2020-10-26 20:01:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-26 20:01:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 5921 transitions. [2020-10-26 20:01:45,265 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 5921 transitions. Word has length 313 [2020-10-26 20:01:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:45,266 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 5921 transitions. [2020-10-26 20:01:45,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 5921 transitions. [2020-10-26 20:01:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:45,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:45,279 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:45,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:01:45,280 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1035511826, now seen corresponding path program 1 times [2020-10-26 20:01:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:45,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946604020] [2020-10-26 20:01:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:45,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:45,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:48,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:50,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:50,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:50,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:01:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 20:01:50,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:50,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:01:50,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-26 20:01:50,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-26 20:01:50,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:50,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:50,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:50,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:50,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:50,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 610 proven. 4 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-10-26 20:01:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946604020] [2020-10-26 20:01:50,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:50,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:01:50,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863454120] [2020-10-26 20:01:50,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:01:50,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:01:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:01:50,961 INFO L87 Difference]: Start difference. First operand 4204 states and 5921 transitions. Second operand 6 states. [2020-10-26 20:01:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:52,790 INFO L93 Difference]: Finished difference Result 16521 states and 23223 transitions. [2020-10-26 20:01:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:01:52,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2020-10-26 20:01:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:52,822 INFO L225 Difference]: With dead ends: 16521 [2020-10-26 20:01:52,822 INFO L226 Difference]: Without dead ends: 12342 [2020-10-26 20:01:52,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:01:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2020-10-26 20:01:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 8308. [2020-10-26 20:01:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8308 states. [2020-10-26 20:01:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8308 states to 8308 states and 11631 transitions. [2020-10-26 20:01:53,405 INFO L78 Accepts]: Start accepts. Automaton has 8308 states and 11631 transitions. Word has length 313 [2020-10-26 20:01:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:53,405 INFO L481 AbstractCegarLoop]: Abstraction has 8308 states and 11631 transitions. [2020-10-26 20:01:53,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:01:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8308 states and 11631 transitions. [2020-10-26 20:01:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-26 20:01:53,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:53,427 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:53,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:01:53,427 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash 443333966, now seen corresponding path program 1 times [2020-10-26 20:01:53,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:53,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816432279] [2020-10-26 20:01:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:53,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:53,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:54,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:54,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:01:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-26 20:01:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:01:54,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:54,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:54,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:54,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-10-26 20:01:54,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816432279] [2020-10-26 20:01:54,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:01:54,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:01:54,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501627035] [2020-10-26 20:01:54,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:01:54,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:01:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:01:54,649 INFO L87 Difference]: Start difference. First operand 8308 states and 11631 transitions. Second operand 4 states. [2020-10-26 20:01:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:55,560 INFO L93 Difference]: Finished difference Result 17407 states and 24589 transitions. [2020-10-26 20:01:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:01:55,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-26 20:01:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:55,582 INFO L225 Difference]: With dead ends: 17407 [2020-10-26 20:01:55,582 INFO L226 Difference]: Without dead ends: 9124 [2020-10-26 20:01:55,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:01:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9124 states. [2020-10-26 20:01:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9124 to 8956. [2020-10-26 20:01:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8956 states. [2020-10-26 20:01:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8956 states to 8956 states and 12399 transitions. [2020-10-26 20:01:56,078 INFO L78 Accepts]: Start accepts. Automaton has 8956 states and 12399 transitions. Word has length 313 [2020-10-26 20:01:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:56,079 INFO L481 AbstractCegarLoop]: Abstraction has 8956 states and 12399 transitions. [2020-10-26 20:01:56,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:01:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8956 states and 12399 transitions. [2020-10-26 20:01:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-26 20:01:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:56,098 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 9, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:56,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 20:01:56,098 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash -26556915, now seen corresponding path program 1 times [2020-10-26 20:01:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098599972] [2020-10-26 20:01:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:56,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:57,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:02:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 20:02:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:01,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:01,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:01,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:01,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 635 proven. 116 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2020-10-26 20:02:01,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098599972] [2020-10-26 20:02:01,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:01,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:02:01,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121355983] [2020-10-26 20:02:01,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:02:01,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:02:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:02:01,609 INFO L87 Difference]: Start difference. First operand 8956 states and 12399 transitions. Second operand 6 states. [2020-10-26 20:02:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:04,654 INFO L93 Difference]: Finished difference Result 21697 states and 30031 transitions. [2020-10-26 20:02:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:02:04,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 315 [2020-10-26 20:02:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:04,679 INFO L225 Difference]: With dead ends: 21697 [2020-10-26 20:02:04,679 INFO L226 Difference]: Without dead ends: 12766 [2020-10-26 20:02:04,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:02:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12766 states. [2020-10-26 20:02:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12766 to 11764. [2020-10-26 20:02:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11764 states. [2020-10-26 20:02:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11764 states to 11764 states and 16287 transitions. [2020-10-26 20:02:05,289 INFO L78 Accepts]: Start accepts. Automaton has 11764 states and 16287 transitions. Word has length 315 [2020-10-26 20:02:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:05,289 INFO L481 AbstractCegarLoop]: Abstraction has 11764 states and 16287 transitions. [2020-10-26 20:02:05,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:02:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 11764 states and 16287 transitions. [2020-10-26 20:02:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-26 20:02:05,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:05,324 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:05,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 20:02:05,325 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 866653977, now seen corresponding path program 1 times [2020-10-26 20:02:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:05,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628433944] [2020-10-26 20:02:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:07,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:07,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 20:02:07,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:07,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:07,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:07,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:07,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:07,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:07,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:07,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-26 20:02:07,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628433944] [2020-10-26 20:02:07,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:07,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:07,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006163043] [2020-10-26 20:02:07,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:07,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:07,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:07,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:07,462 INFO L87 Difference]: Start difference. First operand 11764 states and 16287 transitions. Second operand 4 states. [2020-10-26 20:02:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:08,283 INFO L93 Difference]: Finished difference Result 23839 states and 33025 transitions. [2020-10-26 20:02:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:08,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-10-26 20:02:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:08,307 INFO L225 Difference]: With dead ends: 23839 [2020-10-26 20:02:08,307 INFO L226 Difference]: Without dead ends: 12100 [2020-10-26 20:02:08,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12100 states. [2020-10-26 20:02:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12100 to 11764. [2020-10-26 20:02:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11764 states. [2020-10-26 20:02:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11764 states to 11764 states and 15935 transitions. [2020-10-26 20:02:08,928 INFO L78 Accepts]: Start accepts. Automaton has 11764 states and 15935 transitions. Word has length 316 [2020-10-26 20:02:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:08,929 INFO L481 AbstractCegarLoop]: Abstraction has 11764 states and 15935 transitions. [2020-10-26 20:02:08,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 11764 states and 15935 transitions. [2020-10-26 20:02:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-26 20:02:08,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:08,949 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:08,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 20:02:08,950 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 476550928, now seen corresponding path program 1 times [2020-10-26 20:02:08,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:08,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691538171] [2020-10-26 20:02:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-26 20:02:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:02:09,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:02:09,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:09,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-26 20:02:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691538171] [2020-10-26 20:02:10,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:10,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978990114] [2020-10-26 20:02:10,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:10,002 INFO L87 Difference]: Start difference. First operand 11764 states and 15935 transitions. Second operand 4 states. [2020-10-26 20:02:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:10,869 INFO L93 Difference]: Finished difference Result 24495 states and 33473 transitions. [2020-10-26 20:02:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:10,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2020-10-26 20:02:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:10,893 INFO L225 Difference]: With dead ends: 24495 [2020-10-26 20:02:10,893 INFO L226 Difference]: Without dead ends: 12756 [2020-10-26 20:02:10,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2020-10-26 20:02:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 12692. [2020-10-26 20:02:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12692 states. [2020-10-26 20:02:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12692 states to 12692 states and 17023 transitions. [2020-10-26 20:02:11,686 INFO L78 Accepts]: Start accepts. Automaton has 12692 states and 17023 transitions. Word has length 359 [2020-10-26 20:02:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:11,686 INFO L481 AbstractCegarLoop]: Abstraction has 12692 states and 17023 transitions. [2020-10-26 20:02:11,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12692 states and 17023 transitions. [2020-10-26 20:02:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-26 20:02:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:11,712 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:11,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 20:02:11,712 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1444413061, now seen corresponding path program 1 times [2020-10-26 20:02:11,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:11,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385586578] [2020-10-26 20:02:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:11,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:14,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:14,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-10-26 20:02:14,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:02:14,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3109 [2020-10-26 20:02:14,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-26 20:02:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 20:02:14,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:14,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:14,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:14,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:02:14,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 956 proven. 0 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2020-10-26 20:02:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385586578] [2020-10-26 20:02:15,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:15,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756934474] [2020-10-26 20:02:15,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:15,208 INFO L87 Difference]: Start difference. First operand 12692 states and 17023 transitions. Second operand 4 states. [2020-10-26 20:02:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:16,354 INFO L93 Difference]: Finished difference Result 37528 states and 50402 transitions. [2020-10-26 20:02:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:16,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-10-26 20:02:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:16,383 INFO L225 Difference]: With dead ends: 37528 [2020-10-26 20:02:16,383 INFO L226 Difference]: Without dead ends: 24861 [2020-10-26 20:02:16,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24861 states. [2020-10-26 20:02:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24861 to 18960. [2020-10-26 20:02:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18960 states. [2020-10-26 20:02:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18960 states to 18960 states and 25399 transitions. [2020-10-26 20:02:17,544 INFO L78 Accepts]: Start accepts. Automaton has 18960 states and 25399 transitions. Word has length 422 [2020-10-26 20:02:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:17,545 INFO L481 AbstractCegarLoop]: Abstraction has 18960 states and 25399 transitions. [2020-10-26 20:02:17,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 18960 states and 25399 transitions. [2020-10-26 20:02:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-26 20:02:17,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:17,561 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:17,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 20:02:17,561 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:17,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1570373613, now seen corresponding path program 1 times [2020-10-26 20:02:17,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:17,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092368682] [2020-10-26 20:02:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:18,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:18,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:18,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-26 20:02:18,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-26 20:02:18,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:18,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:02:18,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-26 20:02:18,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:02:18,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:19,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:19,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:19,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:19,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:02:19,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:19,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1235 proven. 26 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2020-10-26 20:02:19,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092368682] [2020-10-26 20:02:19,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:19,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:02:19,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141578984] [2020-10-26 20:02:19,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:02:19,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:02:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:19,142 INFO L87 Difference]: Start difference. First operand 18960 states and 25399 transitions. Second operand 5 states. [2020-10-26 20:02:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:21,499 INFO L93 Difference]: Finished difference Result 56732 states and 75706 transitions. [2020-10-26 20:02:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:02:21,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-10-26 20:02:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:21,539 INFO L225 Difference]: With dead ends: 56732 [2020-10-26 20:02:21,539 INFO L226 Difference]: Without dead ends: 37797 [2020-10-26 20:02:21,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:02:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2020-10-26 20:02:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 25692. [2020-10-26 20:02:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25692 states. [2020-10-26 20:02:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25692 states to 25692 states and 34843 transitions. [2020-10-26 20:02:22,812 INFO L78 Accepts]: Start accepts. Automaton has 25692 states and 34843 transitions. Word has length 424 [2020-10-26 20:02:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:22,812 INFO L481 AbstractCegarLoop]: Abstraction has 25692 states and 34843 transitions. [2020-10-26 20:02:22,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:02:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 25692 states and 34843 transitions. [2020-10-26 20:02:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-26 20:02:22,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:22,836 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 14, 14, 12, 12, 10, 10, 8, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:22,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 20:02:22,836 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash -175845744, now seen corresponding path program 1 times [2020-10-26 20:02:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:22,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704562762] [2020-10-26 20:02:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:22,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:23,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:23,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-26 20:02:23,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:02:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:23,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:23,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2679 backedges. 1558 proven. 0 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2020-10-26 20:02:23,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704562762] [2020-10-26 20:02:23,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:02:23,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:02:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952776135] [2020-10-26 20:02:23,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:02:23,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:02:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:02:23,896 INFO L87 Difference]: Start difference. First operand 25692 states and 34843 transitions. Second operand 4 states. [2020-10-26 20:02:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:25,386 INFO L93 Difference]: Finished difference Result 54815 states and 75513 transitions. [2020-10-26 20:02:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:02:25,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-10-26 20:02:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:25,420 INFO L225 Difference]: With dead ends: 54815 [2020-10-26 20:02:25,420 INFO L226 Difference]: Without dead ends: 29148 [2020-10-26 20:02:25,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:02:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29148 states. [2020-10-26 20:02:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29148 to 28956. [2020-10-26 20:02:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28956 states. [2020-10-26 20:02:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28956 states to 28956 states and 38587 transitions. [2020-10-26 20:02:27,109 INFO L78 Accepts]: Start accepts. Automaton has 28956 states and 38587 transitions. Word has length 487 [2020-10-26 20:02:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:27,109 INFO L481 AbstractCegarLoop]: Abstraction has 28956 states and 38587 transitions. [2020-10-26 20:02:27,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:02:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 28956 states and 38587 transitions. [2020-10-26 20:02:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-10-26 20:02:27,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:27,146 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 17, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:27,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 20:02:27,146 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -197104422, now seen corresponding path program 1 times [2020-10-26 20:02:27,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:27,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985018332] [2020-10-26 20:02:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:27,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:27,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:29,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:32,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:32,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 554 [2020-10-26 20:02:32,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:02:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 20:02:32,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:02:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:02:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 515 [2020-10-26 20:02:32,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:32,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:32,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:32,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:32,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:32,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3541 backedges. 217 proven. 768 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2020-10-26 20:02:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985018332] [2020-10-26 20:02:34,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:34,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:02:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636143037] [2020-10-26 20:02:34,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:02:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:02:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:02:34,109 INFO L87 Difference]: Start difference. First operand 28956 states and 38587 transitions. Second operand 6 states. [2020-10-26 20:02:35,007 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 20:02:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:38,253 INFO L93 Difference]: Finished difference Result 68813 states and 91235 transitions. [2020-10-26 20:02:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:02:38,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 544 [2020-10-26 20:02:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:38,291 INFO L225 Difference]: With dead ends: 68813 [2020-10-26 20:02:38,292 INFO L226 Difference]: Without dead ends: 39714 [2020-10-26 20:02:38,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:02:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39714 states. [2020-10-26 20:02:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39714 to 35924. [2020-10-26 20:02:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35924 states. [2020-10-26 20:02:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35924 states to 35924 states and 47845 transitions. [2020-10-26 20:02:39,815 INFO L78 Accepts]: Start accepts. Automaton has 35924 states and 47845 transitions. Word has length 544 [2020-10-26 20:02:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:39,816 INFO L481 AbstractCegarLoop]: Abstraction has 35924 states and 47845 transitions. [2020-10-26 20:02:39,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:02:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 35924 states and 47845 transitions. [2020-10-26 20:02:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-10-26 20:02:39,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:39,851 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 17, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:39,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 20:02:39,852 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1384142247, now seen corresponding path program 2 times [2020-10-26 20:02:39,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:39,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193607586] [2020-10-26 20:02:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:39,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:39,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:39,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:43,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:43,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 556 [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:02:44,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:02:44,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 517 [2020-10-26 20:02:44,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:45,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:45,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 217 proven. 773 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2020-10-26 20:02:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193607586] [2020-10-26 20:02:46,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:46,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:02:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510717748] [2020-10-26 20:02:46,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:02:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:02:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:02:46,462 INFO L87 Difference]: Start difference. First operand 35924 states and 47845 transitions. Second operand 6 states. [2020-10-26 20:02:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:50,093 INFO L93 Difference]: Finished difference Result 82173 states and 109247 transitions. [2020-10-26 20:02:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:02:50,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 546 [2020-10-26 20:02:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:50,148 INFO L225 Difference]: With dead ends: 82173 [2020-10-26 20:02:50,148 INFO L226 Difference]: Without dead ends: 46274 [2020-10-26 20:02:50,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:02:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46274 states. [2020-10-26 20:02:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46274 to 43276. [2020-10-26 20:02:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43276 states. [2020-10-26 20:02:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43276 states to 43276 states and 57547 transitions. [2020-10-26 20:02:51,853 INFO L78 Accepts]: Start accepts. Automaton has 43276 states and 57547 transitions. Word has length 546 [2020-10-26 20:02:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:51,853 INFO L481 AbstractCegarLoop]: Abstraction has 43276 states and 57547 transitions. [2020-10-26 20:02:51,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:02:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43276 states and 57547 transitions. [2020-10-26 20:02:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-10-26 20:02:51,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:51,889 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 17, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:51,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 20:02:51,890 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2000192976, now seen corresponding path program 1 times [2020-10-26 20:02:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:51,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545011569] [2020-10-26 20:02:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:51,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:55,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:55,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:55,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:56,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 557 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 510 [2020-10-26 20:02:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:57,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:57,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:57,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:57,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 599 proven. 397 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2020-10-26 20:02:58,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545011569] [2020-10-26 20:02:58,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:58,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:02:58,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833292220] [2020-10-26 20:02:58,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:02:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:02:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:02:58,666 INFO L87 Difference]: Start difference. First operand 43276 states and 57547 transitions. Second operand 6 states. [2020-10-26 20:03:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:02,724 INFO L93 Difference]: Finished difference Result 97117 states and 128855 transitions. [2020-10-26 20:03:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:03:02,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 547 [2020-10-26 20:03:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:02,783 INFO L225 Difference]: With dead ends: 97117 [2020-10-26 20:03:02,783 INFO L226 Difference]: Without dead ends: 53866 [2020-10-26 20:03:02,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:03:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53866 states. [2020-10-26 20:03:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53866 to 50244. [2020-10-26 20:03:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50244 states. [2020-10-26 20:03:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50244 states to 50244 states and 66805 transitions. [2020-10-26 20:03:04,579 INFO L78 Accepts]: Start accepts. Automaton has 50244 states and 66805 transitions. Word has length 547 [2020-10-26 20:03:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:04,580 INFO L481 AbstractCegarLoop]: Abstraction has 50244 states and 66805 transitions. [2020-10-26 20:03:04,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 50244 states and 66805 transitions. [2020-10-26 20:03:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-10-26 20:03:04,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:04,622 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 7, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 20:03:04,622 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1830885240, now seen corresponding path program 1 times [2020-10-26 20:03:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:04,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366747008] [2020-10-26 20:03:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:04,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 559 [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:03:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 218 [2020-10-26 20:03:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:03:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:06,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:06,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3474 backedges. 2004 proven. 0 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-26 20:03:06,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366747008] [2020-10-26 20:03:06,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:03:06,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:03:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996213658] [2020-10-26 20:03:06,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:03:06,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:03:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:03:06,562 INFO L87 Difference]: Start difference. First operand 50244 states and 66805 transitions. Second operand 4 states. [2020-10-26 20:03:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:08,912 INFO L93 Difference]: Finished difference Result 100547 states and 133581 transitions. [2020-10-26 20:03:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:03:08,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 549 [2020-10-26 20:03:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:08,976 INFO L225 Difference]: With dead ends: 100547 [2020-10-26 20:03:08,976 INFO L226 Difference]: Without dead ends: 50328 [2020-10-26 20:03:09,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:03:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50328 states. [2020-10-26 20:03:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50328 to 44052. [2020-10-26 20:03:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44052 states. [2020-10-26 20:03:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44052 states to 44052 states and 56053 transitions. [2020-10-26 20:03:11,149 INFO L78 Accepts]: Start accepts. Automaton has 44052 states and 56053 transitions. Word has length 549 [2020-10-26 20:03:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:11,149 INFO L481 AbstractCegarLoop]: Abstraction has 44052 states and 56053 transitions. [2020-10-26 20:03:11,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:03:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 44052 states and 56053 transitions. [2020-10-26 20:03:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2020-10-26 20:03:11,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:11,181 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 17, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:11,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 20:03:11,181 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -28994992, now seen corresponding path program 1 times [2020-10-26 20:03:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652651960] [2020-10-26 20:03:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:16,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 566 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 245 [2020-10-26 20:03:16,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:16,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:16,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 2100 proven. 258 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2020-10-26 20:03:17,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652651960] [2020-10-26 20:03:17,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:17,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401933251] [2020-10-26 20:03:17,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:17,189 INFO L87 Difference]: Start difference. First operand 44052 states and 56053 transitions. Second operand 6 states. [2020-10-26 20:03:17,627 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 20:03:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:21,743 INFO L93 Difference]: Finished difference Result 98069 states and 124727 transitions. [2020-10-26 20:03:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:03:21,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 556 [2020-10-26 20:03:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:21,802 INFO L225 Difference]: With dead ends: 98069 [2020-10-26 20:03:21,802 INFO L226 Difference]: Without dead ends: 53898 [2020-10-26 20:03:21,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:03:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53898 states. [2020-10-26 20:03:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53898 to 49964. [2020-10-26 20:03:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49964 states. [2020-10-26 20:03:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49964 states to 49964 states and 62839 transitions. [2020-10-26 20:03:23,895 INFO L78 Accepts]: Start accepts. Automaton has 49964 states and 62839 transitions. Word has length 556 [2020-10-26 20:03:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:23,895 INFO L481 AbstractCegarLoop]: Abstraction has 49964 states and 62839 transitions. [2020-10-26 20:03:23,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 49964 states and 62839 transitions. [2020-10-26 20:03:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-10-26 20:03:23,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:23,932 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 17, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:23,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 20:03:23,932 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -326595459, now seen corresponding path program 1 times [2020-10-26 20:03:24,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:24,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654229938] [2020-10-26 20:03:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:24,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:26,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:27,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:29,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:29,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 567 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 503 [2020-10-26 20:03:29,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:29,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:29,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3779 backedges. 419 proven. 444 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-26 20:03:31,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654229938] [2020-10-26 20:03:31,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:31,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252233381] [2020-10-26 20:03:31,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:31,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:31,179 INFO L87 Difference]: Start difference. First operand 49964 states and 62839 transitions. Second operand 6 states. [2020-10-26 20:03:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:35,788 INFO L93 Difference]: Finished difference Result 109185 states and 137183 transitions. [2020-10-26 20:03:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:03:35,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 557 [2020-10-26 20:03:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:35,852 INFO L225 Difference]: With dead ends: 109185 [2020-10-26 20:03:35,853 INFO L226 Difference]: Without dead ends: 59246 [2020-10-26 20:03:35,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:03:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59246 states. [2020-10-26 20:03:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59246 to 56380. [2020-10-26 20:03:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56380 states. [2020-10-26 20:03:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56380 states to 56380 states and 70897 transitions. [2020-10-26 20:03:38,389 INFO L78 Accepts]: Start accepts. Automaton has 56380 states and 70897 transitions. Word has length 557 [2020-10-26 20:03:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:38,390 INFO L481 AbstractCegarLoop]: Abstraction has 56380 states and 70897 transitions. [2020-10-26 20:03:38,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:03:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 56380 states and 70897 transitions. [2020-10-26 20:03:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2020-10-26 20:03:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:38,435 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 20, 19, 19, 19, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:38,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 20:03:38,436 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1506668073, now seen corresponding path program 1 times [2020-10-26 20:03:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461860103] [2020-10-26 20:03:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:38,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:40,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:43,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 574 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:03:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:43,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:43,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:43,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:43,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 1892 proven. 0 refuted. 0 times theorem prover too weak. 1956 trivial. 0 not checked. [2020-10-26 20:03:43,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461860103] [2020-10-26 20:03:43,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:03:43,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:03:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313807567] [2020-10-26 20:03:43,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:03:43,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:03:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:03:43,716 INFO L87 Difference]: Start difference. First operand 56380 states and 70897 transitions. Second operand 4 states. [2020-10-26 20:03:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:46,133 INFO L93 Difference]: Finished difference Result 113479 states and 142629 transitions. [2020-10-26 20:03:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:03:46,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 564 [2020-10-26 20:03:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:46,198 INFO L225 Difference]: With dead ends: 113479 [2020-10-26 20:03:46,198 INFO L226 Difference]: Without dead ends: 57124 [2020-10-26 20:03:46,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:03:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57124 states. [2020-10-26 20:03:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57124 to 56380. [2020-10-26 20:03:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56380 states. [2020-10-26 20:03:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56380 states to 56380 states and 70681 transitions. [2020-10-26 20:03:48,658 INFO L78 Accepts]: Start accepts. Automaton has 56380 states and 70681 transitions. Word has length 564 [2020-10-26 20:03:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:48,658 INFO L481 AbstractCegarLoop]: Abstraction has 56380 states and 70681 transitions. [2020-10-26 20:03:48,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:03:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 56380 states and 70681 transitions. [2020-10-26 20:03:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-10-26 20:03:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:48,697 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 18, 18, 18, 16, 16, 14, 14, 12, 12, 10, 10, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:48,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 20:03:48,697 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash -585122940, now seen corresponding path program 3 times [2020-10-26 20:03:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:48,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924185309] [2020-10-26 20:03:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:48,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:52,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:52,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:52,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:53,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 596 [2020-10-26 20:03:53,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:03:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 20:03:53,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:03:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:03:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-26 20:03:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:54,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:54,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:54,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:54,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:54,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:54,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 2252 proven. 371 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2020-10-26 20:03:55,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924185309] [2020-10-26 20:03:55,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:55,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:03:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589093024] [2020-10-26 20:03:55,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:03:55,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:03:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:03:55,034 INFO L87 Difference]: Start difference. First operand 56380 states and 70681 transitions. Second operand 6 states. [2020-10-26 20:03:55,524 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-26 20:04:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:04:00,544 INFO L93 Difference]: Finished difference Result 129049 states and 161393 transitions. [2020-10-26 20:04:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:04:00,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 586 [2020-10-26 20:04:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:04:00,626 INFO L225 Difference]: With dead ends: 129049 [2020-10-26 20:04:00,626 INFO L226 Difference]: Without dead ends: 72694 [2020-10-26 20:04:00,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:04:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72694 states. [2020-10-26 20:04:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72694 to 68052. [2020-10-26 20:04:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68052 states. [2020-10-26 20:04:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68052 states to 68052 states and 85111 transitions. [2020-10-26 20:04:03,939 INFO L78 Accepts]: Start accepts. Automaton has 68052 states and 85111 transitions. Word has length 586 [2020-10-26 20:04:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:04:03,940 INFO L481 AbstractCegarLoop]: Abstraction has 68052 states and 85111 transitions. [2020-10-26 20:04:03,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:04:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 68052 states and 85111 transitions. [2020-10-26 20:04:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2020-10-26 20:04:04,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:04:04,297 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 18, 18, 16, 16, 14, 14, 12, 12, 12, 12, 9, 7, 7, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:04:04,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 20:04:04,297 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:04:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:04:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1897475353, now seen corresponding path program 1 times [2020-10-26 20:04:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:04:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688871398] [2020-10-26 20:04:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:04:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:04,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:04,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 626 [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:04:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 251 [2020-10-26 20:04:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 20:04:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:04:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:05,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:04:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:04:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 2518 proven. 0 refuted. 0 times theorem prover too weak. 1883 trivial. 0 not checked. [2020-10-26 20:04:05,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688871398] [2020-10-26 20:04:05,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:04:05,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:04:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136770420] [2020-10-26 20:04:05,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:04:05,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:04:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:04:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:04:05,695 INFO L87 Difference]: Start difference. First operand 68052 states and 85111 transitions. Second operand 4 states. [2020-10-26 20:04:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:04:08,947 INFO L93 Difference]: Finished difference Result 136175 states and 170157 transitions. [2020-10-26 20:04:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:04:08,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 616 [2020-10-26 20:04:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:04:09,023 INFO L225 Difference]: With dead ends: 136175 [2020-10-26 20:04:09,024 INFO L226 Difference]: Without dead ends: 68148 [2020-10-26 20:04:09,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:04:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68148 states. [2020-10-26 20:04:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68148 to 67788. [2020-10-26 20:04:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67788 states. [2020-10-26 20:04:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67788 states to 67788 states and 84595 transitions. [2020-10-26 20:04:12,539 INFO L78 Accepts]: Start accepts. Automaton has 67788 states and 84595 transitions. Word has length 616 [2020-10-26 20:04:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:04:12,540 INFO L481 AbstractCegarLoop]: Abstraction has 67788 states and 84595 transitions. [2020-10-26 20:04:12,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:04:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 67788 states and 84595 transitions. [2020-10-26 20:04:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-10-26 20:04:12,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:04:12,595 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 19, 19, 19, 17, 17, 15, 15, 13, 13, 11, 11, 11, 11, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:04:12,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 20:04:12,596 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:04:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:04:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 999020119, now seen corresponding path program 1 times [2020-10-26 20:04:12,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:04:12,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661859895] [2020-10-26 20:04:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:04:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:12,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:12,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:17,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:17,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:17,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 633 [2020-10-26 20:04:17,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:04:17,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:04:17,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:17,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:04:17,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:04:17,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-26 20:04:17,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:18,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:04:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:18,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:04:18,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:04:18,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:04:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:04:18,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:04:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:04:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:04:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:04:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:04:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4483 backedges. 2663 proven. 201 refuted. 0 times theorem prover too weak. 1619 trivial. 0 not checked. [2020-10-26 20:04:18,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661859895] [2020-10-26 20:04:18,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:04:18,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:04:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935786169] [2020-10-26 20:04:18,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:04:18,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:04:18,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:04:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:04:18,975 INFO L87 Difference]: Start difference. First operand 67788 states and 84595 transitions. Second operand 6 states. [2020-10-26 20:04:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:04:23,608 INFO L93 Difference]: Finished difference Result 136373 states and 170063 transitions. [2020-10-26 20:04:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:04:23,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 623 [2020-10-26 20:04:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:04:23,687 INFO L225 Difference]: With dead ends: 136373 [2020-10-26 20:04:23,687 INFO L226 Difference]: Without dead ends: 75914 [2020-10-26 20:04:23,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:04:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75914 states. [2020-10-26 20:04:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75914 to 75133. [2020-10-26 20:04:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75133 states. [2020-10-26 20:04:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75133 states to 75133 states and 93782 transitions. [2020-10-26 20:04:27,745 INFO L78 Accepts]: Start accepts. Automaton has 75133 states and 93782 transitions. Word has length 623 [2020-10-26 20:04:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:04:27,745 INFO L481 AbstractCegarLoop]: Abstraction has 75133 states and 93782 transitions. [2020-10-26 20:04:27,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:04:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 75133 states and 93782 transitions. [2020-10-26 20:04:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-10-26 20:04:27,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:04:27,821 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 19, 19, 19, 17, 17, 15, 15, 13, 13, 11, 11, 11, 11, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:04:27,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 20:04:27,822 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:04:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:04:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1893477057, now seen corresponding path program 1 times [2020-10-26 20:04:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:04:27,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948725860] [2020-10-26 20:04:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:04:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:04:27,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:04:29,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking...