/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:08:00,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:08:00,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:08:00,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:08:00,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:08:00,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:08:00,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:08:00,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:08:00,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:08:00,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:08:00,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:08:00,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:08:00,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:08:00,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:08:00,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:08:00,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:08:00,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:08:00,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:08:00,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:08:00,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:08:00,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:08:00,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:08:00,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:08:00,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:08:00,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:08:00,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:08:00,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:08:00,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:08:00,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:08:00,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:08:00,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:08:00,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:08:00,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:08:00,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:08:00,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:08:00,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:08:00,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:08:00,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:08:00,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:08:00,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:08:00,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:08:00,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 13:08:00,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:08:00,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:08:00,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:08:00,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:08:00,295 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:08:00,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:08:00,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:08:00,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:08:00,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:08:00,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:08:00,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:08:00,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:08:00,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:08:00,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:08:00,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:08:00,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:08:00,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:08:00,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:08:00,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:08:00,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:08:00,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:08:00,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:08:00,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:08:00,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:08:00,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:08:00,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:08:00,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:08:00,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:08:00,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:08:00,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:08:00,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:08:00,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:08:00,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:08:00,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:08:00,907 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:08:00,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label37.c [2020-10-28 13:08:00,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b26447e/3c996bcced7d4e279d053d78fc76410c/FLAGa5397b337 [2020-10-28 13:08:01,936 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:08:01,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label37.c [2020-10-28 13:08:01,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b26447e/3c996bcced7d4e279d053d78fc76410c/FLAGa5397b337 [2020-10-28 13:08:02,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b26447e/3c996bcced7d4e279d053d78fc76410c [2020-10-28 13:08:02,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:08:02,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:08:02,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:08:02,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:08:02,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:08:02,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:08:02" (1/1) ... [2020-10-28 13:08:02,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e90d70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:02, skipping insertion in model container [2020-10-28 13:08:02,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:08:02" (1/1) ... [2020-10-28 13:08:02,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:08:02,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:08:03,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:08:03,154 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:08:03,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:08:03,581 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:08:03,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03 WrapperNode [2020-10-28 13:08:03,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:08:03,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:08:03,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:08:03,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:08:03,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... [2020-10-28 13:08:03,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:08:03,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:08:03,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:08:03,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:08:03,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:08:03,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:08:03,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:08:03,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:08:03,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:08:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:08:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:08:03,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:08:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:08:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:08:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:08:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:08:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:08:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:08:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:08:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:08:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:08:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:08:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:08:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:08:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:08:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:08:07,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:08:07,645 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:08:07,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:08:07 BoogieIcfgContainer [2020-10-28 13:08:07,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:08:07,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:08:07,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:08:07,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:08:07,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:08:02" (1/3) ... [2020-10-28 13:08:07,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36915287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:08:07, skipping insertion in model container [2020-10-28 13:08:07,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:08:03" (2/3) ... [2020-10-28 13:08:07,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36915287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:08:07, skipping insertion in model container [2020-10-28 13:08:07,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:08:07" (3/3) ... [2020-10-28 13:08:07,659 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label37.c [2020-10-28 13:08:07,673 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:08:07,681 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:08:07,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:08:07,731 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:08:07,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:08:07,732 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:08:07,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:08:07,732 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:08:07,732 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:08:07,732 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:08:07,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:08:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:08:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 13:08:07,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:08:07,772 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] [2020-10-28 13:08:07,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:08:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:08:07,780 INFO L82 PathProgramCache]: Analyzing trace with hash -200132009, now seen corresponding path program 1 times [2020-10-28 13:08:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:08:07,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058651710] [2020-10-28 13:08:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:08:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 13:08:08,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-28 13:08:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:08,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:08:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:08:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 13:08:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:08:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:08:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:08,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:08,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:08:08,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 13:08:08,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:08,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:08:08,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:08:08,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:08:08,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:08:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:08:08,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058651710] [2020-10-28 13:08:08,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:08:08,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:08:08,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468770055] [2020-10-28 13:08:08,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:08:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:08:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:08:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:08:08,704 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:08:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:08:17,496 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-28 13:08:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:08:17,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 13:08:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:08:17,539 INFO L225 Difference]: With dead ends: 1229 [2020-10-28 13:08:17,539 INFO L226 Difference]: Without dead ends: 709 [2020-10-28 13:08:17,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:08:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-28 13:08:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-28 13:08:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 13:08:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-28 13:08:17,684 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 27 [2020-10-28 13:08:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:08:17,685 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-28 13:08:17,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:08:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-28 13:08:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 13:08:17,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:08:17,691 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:08:17,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:08:17,691 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:08:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:08:17,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2031441279, now seen corresponding path program 1 times [2020-10-28 13:08:17,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:08:17,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490109593] [2020-10-28 13:08:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:08:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:19,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:19,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:19,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 13:08:19,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:08:19,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1615 [2020-10-28 13:08:19,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:19,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:08:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:08:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:08:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:08:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:08:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:19,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:19,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:19,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:08:19,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:19,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 13:08:19,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:19,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:08:19,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:08:19,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:08:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 13:08:19,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:08:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:19,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:19,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:08:19,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:19,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 13:08:19,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:19,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:08:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:08:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 13:08:19,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:08:19,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490109593] [2020-10-28 13:08:19,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:08:19,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:08:19,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475268405] [2020-10-28 13:08:19,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:08:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:08:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:08:19,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:08:19,878 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-28 13:08:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:08:28,812 INFO L93 Difference]: Finished difference Result 1722 states and 2740 transitions. [2020-10-28 13:08:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:08:28,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 13:08:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:08:28,825 INFO L225 Difference]: With dead ends: 1722 [2020-10-28 13:08:28,825 INFO L226 Difference]: Without dead ends: 1033 [2020-10-28 13:08:28,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:08:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-28 13:08:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 999. [2020-10-28 13:08:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-28 13:08:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1350 transitions. [2020-10-28 13:08:28,885 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1350 transitions. Word has length 97 [2020-10-28 13:08:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:08:28,886 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1350 transitions. [2020-10-28 13:08:28,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:08:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1350 transitions. [2020-10-28 13:08:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 13:08:28,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:08:28,893 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:08:28,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:08:28,895 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:08:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:08:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1975681223, now seen corresponding path program 1 times [2020-10-28 13:08:28,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:08:28,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267323072] [2020-10-28 13:08:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:08:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:29,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:29,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:29,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 13:08:29,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:08:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-28 13:08:29,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:29,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:08:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:08:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:08:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:29,786 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:08:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:08:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:29,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:29,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:08:29,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:29,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 13:08:29,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:29,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:08:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:08:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:08:29,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:29,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:08:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:30,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:30,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:08:30,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:08:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:08:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267323072] [2020-10-28 13:08:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:08:30,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:08:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302353468] [2020-10-28 13:08:30,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:08:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:08:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:08:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:08:30,094 INFO L87 Difference]: Start difference. First operand 999 states and 1350 transitions. Second operand 8 states. [2020-10-28 13:08:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:08:45,208 INFO L93 Difference]: Finished difference Result 2986 states and 4301 transitions. [2020-10-28 13:08:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:08:45,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-28 13:08:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:08:45,228 INFO L225 Difference]: With dead ends: 2986 [2020-10-28 13:08:45,228 INFO L226 Difference]: Without dead ends: 2300 [2020-10-28 13:08:45,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 13:08:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2020-10-28 13:08:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1973. [2020-10-28 13:08:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1973 states. [2020-10-28 13:08:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2626 transitions. [2020-10-28 13:08:45,301 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2626 transitions. Word has length 101 [2020-10-28 13:08:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:08:45,301 INFO L481 AbstractCegarLoop]: Abstraction has 1973 states and 2626 transitions. [2020-10-28 13:08:45,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:08:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2626 transitions. [2020-10-28 13:08:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 13:08:45,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:08:45,305 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:08:45,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:08:45,305 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:08:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:08:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash 284313570, now seen corresponding path program 1 times [2020-10-28 13:08:45,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:08:45,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452302407] [2020-10-28 13:08:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:08:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:48,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:48,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 13:08:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:08:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3173 [2020-10-28 13:08:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:48,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:08:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:08:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 13:08:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:48,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:08:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:48,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:48,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:08:48,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:08:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:08:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:08:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:08:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:48,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:49,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:08:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:08:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:08:49,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:08:49,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 13:08:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:08:49,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452302407] [2020-10-28 13:08:49,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:08:49,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:08:49,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719402231] [2020-10-28 13:08:49,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:08:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:08:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:08:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:08:49,725 INFO L87 Difference]: Start difference. First operand 1973 states and 2626 transitions. Second operand 8 states. [2020-10-28 13:08:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:08:58,534 INFO L93 Difference]: Finished difference Result 4290 states and 5631 transitions. [2020-10-28 13:08:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:08:58,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 227 [2020-10-28 13:08:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:08:58,558 INFO L225 Difference]: With dead ends: 4290 [2020-10-28 13:08:58,558 INFO L226 Difference]: Without dead ends: 2323 [2020-10-28 13:08:58,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:08:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2020-10-28 13:08:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2287. [2020-10-28 13:08:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-10-28 13:08:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2948 transitions. [2020-10-28 13:08:58,661 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2948 transitions. Word has length 227 [2020-10-28 13:08:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:08:58,663 INFO L481 AbstractCegarLoop]: Abstraction has 2287 states and 2948 transitions. [2020-10-28 13:08:58,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:08:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2948 transitions. [2020-10-28 13:08:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-28 13:08:58,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:08:58,677 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:08:58,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:08:58,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:08:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:08:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash 190866347, now seen corresponding path program 1 times [2020-10-28 13:08:58,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:08:58,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961658964] [2020-10-28 13:08:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:08:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:08:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:08:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:00,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:00,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 13:09:00,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:09:00,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-28 13:09:00,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:00,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:09:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 13:09:00,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:09:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:00,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:00,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:00,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:09:00,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:09:00,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:00,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:09:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:09:00,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:00,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:09:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:00,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:09:00,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-28 13:09:00,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:00,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:09:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:00,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:09:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:09:01,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961658964] [2020-10-28 13:09:01,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:09:01,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:09:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19839007] [2020-10-28 13:09:01,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:09:01,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:09:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:09:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:09:01,090 INFO L87 Difference]: Start difference. First operand 2287 states and 2948 transitions. Second operand 5 states. [2020-10-28 13:09:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:09:11,311 INFO L93 Difference]: Finished difference Result 4574 states and 6377 transitions. [2020-10-28 13:09:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:09:11,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-28 13:09:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:09:11,337 INFO L225 Difference]: With dead ends: 4574 [2020-10-28 13:09:11,337 INFO L226 Difference]: Without dead ends: 3540 [2020-10-28 13:09:11,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:09:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2020-10-28 13:09:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3529. [2020-10-28 13:09:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3529 states. [2020-10-28 13:09:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 4399 transitions. [2020-10-28 13:09:11,445 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 4399 transitions. Word has length 301 [2020-10-28 13:09:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:09:11,446 INFO L481 AbstractCegarLoop]: Abstraction has 3529 states and 4399 transitions. [2020-10-28 13:09:11,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:09:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 4399 transitions. [2020-10-28 13:09:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-28 13:09:11,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:09:11,456 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:09:11,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:09:11,457 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:09:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:09:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2107002631, now seen corresponding path program 1 times [2020-10-28 13:09:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:09:11,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315584451] [2020-10-28 13:09:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:09:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:11,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:14,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 395 [2020-10-28 13:09:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:09:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2625 [2020-10-28 13:09:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:14,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:09:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:09:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:14,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:09:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:14,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:14,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:14,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:09:14,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:14,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 13:09:14,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:14,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:14,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:09:14,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:14,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:09:14,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:14,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:09:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:14,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:14,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:09:14,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:14,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-28 13:09:14,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:14,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:14,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:09:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:09:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:15,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:09:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:15,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:15,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:09:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 13:09:15,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:15,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:09:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:09:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:09:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315584451] [2020-10-28 13:09:15,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:09:15,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:09:15,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120108070] [2020-10-28 13:09:15,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:09:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:09:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:09:15,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:09:15,522 INFO L87 Difference]: Start difference. First operand 3529 states and 4399 transitions. Second operand 7 states. [2020-10-28 13:09:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:09:31,383 INFO L93 Difference]: Finished difference Result 7734 states and 9875 transitions. [2020-10-28 13:09:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:09:31,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 381 [2020-10-28 13:09:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:09:31,411 INFO L225 Difference]: With dead ends: 7734 [2020-10-28 13:09:31,411 INFO L226 Difference]: Without dead ends: 4518 [2020-10-28 13:09:31,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:09:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2020-10-28 13:09:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4491. [2020-10-28 13:09:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4491 states. [2020-10-28 13:09:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 5574 transitions. [2020-10-28 13:09:31,581 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 5574 transitions. Word has length 381 [2020-10-28 13:09:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:09:31,582 INFO L481 AbstractCegarLoop]: Abstraction has 4491 states and 5574 transitions. [2020-10-28 13:09:31,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:09:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 5574 transitions. [2020-10-28 13:09:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-28 13:09:31,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:09:31,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:09:31,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:09:31,593 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:09:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:09:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1102477526, now seen corresponding path program 1 times [2020-10-28 13:09:31,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:09:31,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669221178] [2020-10-28 13:09:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:09:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:32,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:32,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:35,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:36,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:36,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-10-28 13:09:36,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:09:36,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 13:09:36,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:36,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:36,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:09:36,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:09:36,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-10-28 13:09:36,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:36,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:09:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:36,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:36,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:36,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:09:36,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:36,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:09:36,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:36,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:09:36,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:09:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:37,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:37,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:09:37,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:09:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:09:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:37,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:37,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:09:37,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:09:37,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-28 13:09:37,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:37,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:37,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:09:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:09:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:37,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-28 13:09:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:38,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:38,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:09:38,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:38,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 13:09:38,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:38,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:09:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:09:38,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:09:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 299 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 13:09:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669221178] [2020-10-28 13:09:38,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:09:38,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:09:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777223565] [2020-10-28 13:09:38,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:09:38,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:09:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:09:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:09:38,467 INFO L87 Difference]: Start difference. First operand 4491 states and 5574 transitions. Second operand 8 states. [2020-10-28 13:09:39,410 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:09:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:09:56,285 INFO L93 Difference]: Finished difference Result 11311 states and 14796 transitions. [2020-10-28 13:09:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:09:56,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 402 [2020-10-28 13:09:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:09:56,328 INFO L225 Difference]: With dead ends: 11311 [2020-10-28 13:09:56,328 INFO L226 Difference]: Without dead ends: 6813 [2020-10-28 13:09:56,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-28 13:09:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2020-10-28 13:09:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 5837. [2020-10-28 13:09:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5837 states. [2020-10-28 13:09:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 7141 transitions. [2020-10-28 13:09:56,579 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 7141 transitions. Word has length 402 [2020-10-28 13:09:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:09:56,579 INFO L481 AbstractCegarLoop]: Abstraction has 5837 states and 7141 transitions. [2020-10-28 13:09:56,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:09:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 7141 transitions. [2020-10-28 13:09:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-10-28 13:09:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:09:56,590 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:09:56,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:09:56,591 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:09:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:09:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1917422474, now seen corresponding path program 1 times [2020-10-28 13:09:56,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:09:56,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409249033] [2020-10-28 13:09:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:09:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:56,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:59,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:59,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-10-28 13:09:59,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:09:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2963 [2020-10-28 13:09:59,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:59,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:09:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:09:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:09:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:59,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:09:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:09:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:09:59,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:09:59,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:09:59,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:09:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:09:59,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:09:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:10:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:00,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:00,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:10:00,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:00,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 13:10:00,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:00,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:00,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:10:00,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:00,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:10:00,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:00,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:10:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:00,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:00,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:10:00,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:10:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:10:00,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:10:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409249033] [2020-10-28 13:10:01,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:10:01,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:10:01,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234526097] [2020-10-28 13:10:01,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:10:01,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:10:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:10:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:10:01,174 INFO L87 Difference]: Start difference. First operand 5837 states and 7141 transitions. Second operand 7 states. [2020-10-28 13:10:04,613 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:10:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:10:16,812 INFO L93 Difference]: Finished difference Result 12399 states and 15361 transitions. [2020-10-28 13:10:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:10:16,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 412 [2020-10-28 13:10:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:10:16,864 INFO L225 Difference]: With dead ends: 12399 [2020-10-28 13:10:16,865 INFO L226 Difference]: Without dead ends: 6875 [2020-10-28 13:10:16,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:10:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2020-10-28 13:10:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6796. [2020-10-28 13:10:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6796 states. [2020-10-28 13:10:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 8225 transitions. [2020-10-28 13:10:17,091 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 8225 transitions. Word has length 412 [2020-10-28 13:10:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:10:17,092 INFO L481 AbstractCegarLoop]: Abstraction has 6796 states and 8225 transitions. [2020-10-28 13:10:17,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:10:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 8225 transitions. [2020-10-28 13:10:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-28 13:10:17,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:10:17,103 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:10:17,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:10:17,104 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:10:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:10:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1540340354, now seen corresponding path program 1 times [2020-10-28 13:10:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:10:17,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140969764] [2020-10-28 13:10:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:10:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:18,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:18,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 438 [2020-10-28 13:10:18,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:18,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-28 13:10:18,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:18,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:18,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:10:18,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:10:18,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 13:10:18,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:10:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:18,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:18,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:10:18,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:18,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:10:18,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:18,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:18,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:18,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:10:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:18,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:18,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:10:18,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 13:10:18,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:18,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:18,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:10:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:18,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:18,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:18,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:10:18,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 13:10:18,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:18,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:10:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:10:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:10:18,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140969764] [2020-10-28 13:10:18,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:10:18,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:10:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552897096] [2020-10-28 13:10:18,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:10:18,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:10:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:10:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:10:18,997 INFO L87 Difference]: Start difference. First operand 6796 states and 8225 transitions. Second operand 5 states. [2020-10-28 13:10:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:10:29,014 INFO L93 Difference]: Finished difference Result 13904 states and 17410 transitions. [2020-10-28 13:10:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:10:29,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-10-28 13:10:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:10:29,045 INFO L225 Difference]: With dead ends: 13904 [2020-10-28 13:10:29,045 INFO L226 Difference]: Without dead ends: 7421 [2020-10-28 13:10:29,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:10:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2020-10-28 13:10:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 7110. [2020-10-28 13:10:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7110 states. [2020-10-28 13:10:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 8777 transitions. [2020-10-28 13:10:29,242 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 8777 transitions. Word has length 424 [2020-10-28 13:10:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:10:29,243 INFO L481 AbstractCegarLoop]: Abstraction has 7110 states and 8777 transitions. [2020-10-28 13:10:29,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:10:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 8777 transitions. [2020-10-28 13:10:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-28 13:10:29,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:10:29,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:10:29,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:10:29,258 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:10:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:10:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2000795275, now seen corresponding path program 1 times [2020-10-28 13:10:29,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:10:29,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269788452] [2020-10-28 13:10:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:10:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:32,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 519 [2020-10-28 13:10:32,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:10:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3302 [2020-10-28 13:10:32,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:32,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:32,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:10:32,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:10:32,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:10:32,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:10:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:32,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:32,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:10:32,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:10:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:32,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:33,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:33,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:10:33,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:33,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:10:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:33,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:10:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:10:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:33,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:10:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:33,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:33,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 13:10:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 13:10:33,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:33,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:10:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:10:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:10:33,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 192 proven. 20 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:10:33,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269788452] [2020-10-28 13:10:33,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:10:33,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:10:33,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317179803] [2020-10-28 13:10:33,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:10:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:10:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:10:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:10:33,740 INFO L87 Difference]: Start difference. First operand 7110 states and 8777 transitions. Second operand 6 states. [2020-10-28 13:10:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:10:46,188 INFO L93 Difference]: Finished difference Result 15100 states and 20286 transitions. [2020-10-28 13:10:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 13:10:46,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 503 [2020-10-28 13:10:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:10:46,245 INFO L225 Difference]: With dead ends: 15100 [2020-10-28 13:10:46,245 INFO L226 Difference]: Without dead ends: 9862 [2020-10-28 13:10:46,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:10:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9862 states. [2020-10-28 13:10:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9862 to 9749. [2020-10-28 13:10:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9749 states. [2020-10-28 13:10:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 12345 transitions. [2020-10-28 13:10:46,618 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 12345 transitions. Word has length 503 [2020-10-28 13:10:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:10:46,620 INFO L481 AbstractCegarLoop]: Abstraction has 9749 states and 12345 transitions. [2020-10-28 13:10:46,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:10:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 12345 transitions. [2020-10-28 13:10:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-10-28 13:10:46,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:10:46,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:10:46,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:10:46,640 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:10:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:10:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2088771729, now seen corresponding path program 1 times [2020-10-28 13:10:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:10:46,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772053926] [2020-10-28 13:10:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:10:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:47,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:50,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:50,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 541 [2020-10-28 13:10:50,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:10:50,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3863 [2020-10-28 13:10:50,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:50,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:10:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:10:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 13:10:50,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:10:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:10:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:50,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:50,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:50,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:10:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:51,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:51,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:10:51,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:51,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 13:10:51,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:51,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:51,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:10:51,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:10:51,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:51,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:10:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:51,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:10:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:10:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:10:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:10:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:10:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:10:51,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:10:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:10:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 13:10:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:10:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:10:51,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772053926] [2020-10-28 13:10:51,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:10:51,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:10:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060295256] [2020-10-28 13:10:51,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:10:51,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:10:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:10:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:10:51,780 INFO L87 Difference]: Start difference. First operand 9749 states and 12345 transitions. Second operand 7 states. [2020-10-28 13:10:55,290 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:11:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:11:12,368 INFO L93 Difference]: Finished difference Result 21486 states and 28378 transitions. [2020-10-28 13:11:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:11:12,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 525 [2020-10-28 13:11:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:11:12,421 INFO L225 Difference]: With dead ends: 21486 [2020-10-28 13:11:12,421 INFO L226 Difference]: Without dead ends: 13609 [2020-10-28 13:11:12,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:11:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13609 states. [2020-10-28 13:11:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13609 to 12320. [2020-10-28 13:11:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12320 states. [2020-10-28 13:11:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12320 states to 12320 states and 15865 transitions. [2020-10-28 13:11:12,920 INFO L78 Accepts]: Start accepts. Automaton has 12320 states and 15865 transitions. Word has length 525 [2020-10-28 13:11:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:11:12,921 INFO L481 AbstractCegarLoop]: Abstraction has 12320 states and 15865 transitions. [2020-10-28 13:11:12,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:11:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12320 states and 15865 transitions. [2020-10-28 13:11:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-10-28 13:11:12,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:12,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:12,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:11:12,931 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 184813021, now seen corresponding path program 1 times [2020-10-28 13:11:12,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:12,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394283849] [2020-10-28 13:11:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:16,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:18,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:18,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 568 [2020-10-28 13:11:18,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:11:18,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 13:11:18,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:18,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:11:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 13:11:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:18,399 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:11:18,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:18,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:18,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:18,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:11:18,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:18,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:11:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:11:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:11:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:18,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:11:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:18,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:18,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:11:18,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:11:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:18,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:11:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:18,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:19,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:19,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 13:11:19,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:19,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 13:11:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:11:19,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394283849] [2020-10-28 13:11:19,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:11:19,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:11:19,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425723657] [2020-10-28 13:11:19,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:11:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:11:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:11:19,673 INFO L87 Difference]: Start difference. First operand 12320 states and 15865 transitions. Second operand 7 states. [2020-10-28 13:11:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:11:34,925 INFO L93 Difference]: Finished difference Result 28068 states and 37677 transitions. [2020-10-28 13:11:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:11:34,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 552 [2020-10-28 13:11:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:11:34,990 INFO L225 Difference]: With dead ends: 28068 [2020-10-28 13:11:34,990 INFO L226 Difference]: Without dead ends: 17620 [2020-10-28 13:11:35,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:11:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17620 states. [2020-10-28 13:11:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17620 to 17285. [2020-10-28 13:11:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17285 states. [2020-10-28 13:11:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17285 states to 17285 states and 22395 transitions. [2020-10-28 13:11:35,479 INFO L78 Accepts]: Start accepts. Automaton has 17285 states and 22395 transitions. Word has length 552 [2020-10-28 13:11:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:11:35,481 INFO L481 AbstractCegarLoop]: Abstraction has 17285 states and 22395 transitions. [2020-10-28 13:11:35,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:11:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 17285 states and 22395 transitions. [2020-10-28 13:11:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-10-28 13:11:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:35,494 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:35,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:11:35,495 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1430368700, now seen corresponding path program 1 times [2020-10-28 13:11:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:35,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812366569] [2020-10-28 13:11:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:35,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:40,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:40,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 605 [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 576 [2020-10-28 13:11:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 13:11:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:40,953 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:11:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:40,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:40,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:40,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:40,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:11:40,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:40,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:11:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:11:40,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:41,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:11:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:41,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:41,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:11:41,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:41,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 13:11:41,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:41,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:11:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:11:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:41,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:11:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:41,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:41,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:11:41,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:11:41,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:41,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:11:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:41,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:41,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:41,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-28 13:11:41,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-10-28 13:11:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812366569] [2020-10-28 13:11:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:11:42,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:11:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171524433] [2020-10-28 13:11:42,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:11:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:11:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:11:42,050 INFO L87 Difference]: Start difference. First operand 17285 states and 22395 transitions. Second operand 5 states. [2020-10-28 13:11:42,217 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 63