/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem17_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:24:09,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:24:09,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:24:09,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:24:09,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:24:09,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:24:09,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:24:09,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:24:09,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:24:09,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:24:09,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:24:09,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:24:09,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:24:09,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:24:09,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:24:09,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:24:09,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:24:09,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:24:09,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:24:09,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:24:09,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:24:09,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:24:09,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:24:09,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:24:09,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:24:09,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:24:09,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:24:09,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:24:09,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:24:09,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:24:09,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:24:09,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:24:09,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:24:09,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:24:09,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:24:09,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:24:09,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:24:09,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:24:09,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:24:09,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:24:09,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:24:09,353 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 [2020-10-29 08:24:09,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:24:09,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:24:09,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:24:09,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:24:09,414 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:24:09,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:24:09,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:24:09,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:24:09,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:24:09,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:24:09,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:24:09,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:24:09,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:24:09,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:24:09,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:24:09,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:24:09,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:24:09,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:24:09,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:24:09,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:24:09,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:24:09,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:24:09,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:24:09,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:24:09,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:24:09,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:24:09,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:24:09,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:24:09,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:24:09,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:24:09,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:24:09,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:24:09,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:24:09,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:24:09,943 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:24:09,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2020-10-29 08:24:10,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa67ec95/e1214c4d89244bf5b89d1692e65c705c/FLAGe446802a1 [2020-10-29 08:24:11,272 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:24:11,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2020-10-29 08:24:11,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa67ec95/e1214c4d89244bf5b89d1692e65c705c/FLAGe446802a1 [2020-10-29 08:24:11,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa67ec95/e1214c4d89244bf5b89d1692e65c705c [2020-10-29 08:24:11,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:24:11,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:24:11,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:24:11,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:24:11,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:24:11,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:24:11" (1/1) ... [2020-10-29 08:24:11,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b223a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:11, skipping insertion in model container [2020-10-29 08:24:11,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:24:11" (1/1) ... [2020-10-29 08:24:11,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:24:11,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:24:13,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:24:13,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:24:13,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:24:13,646 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:24:13,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13 WrapperNode [2020-10-29 08:24:13,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:24:13,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:24:13,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:24:13,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:24:13,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (1/1) ... [2020-10-29 08:24:13,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:24:13,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:24:13,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:24:13,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:24:13,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (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 [2020-10-29 08:24:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:24:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:24:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:24:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:24:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:24:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:24:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:24:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:24:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:24:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:24:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:24:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:24:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:24:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:24:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:24:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:24:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:24:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:24:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:24:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:24:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:24:23,618 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:24:23,618 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:24:23,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:23 BoogieIcfgContainer [2020-10-29 08:24:23,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:24:23,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:24:23,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:24:23,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:24:23,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:24:11" (1/3) ... [2020-10-29 08:24:23,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40af2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:23, skipping insertion in model container [2020-10-29 08:24:23,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:24:13" (2/3) ... [2020-10-29 08:24:23,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40af2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:23, skipping insertion in model container [2020-10-29 08:24:23,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:23" (3/3) ... [2020-10-29 08:24:23,632 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label54.c [2020-10-29 08:24:23,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:24:23,658 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:24:23,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:24:23,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:24:23,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:24:23,730 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:24:23,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:24:23,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:24:23,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:24:23,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:24:23,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:24:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:24:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 08:24:23,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:23,783 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] [2020-10-29 08:24:23,784 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash -592398350, now seen corresponding path program 1 times [2020-10-29 08:24:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:23,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150286707] [2020-10-29 08:24:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:24,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:24,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 08:24:24,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-29 08:24:24,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:24,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:24,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 08:24:24,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:24:24,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:24,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:24,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:24,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:24,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:24,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-29 08:24:24,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:24,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:24,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:24,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:24,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:24,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:24,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150286707] [2020-10-29 08:24:24,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:24,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:24:24,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260514248] [2020-10-29 08:24:24,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:24:24,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:24:24,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:24:24,958 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:24:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:36,973 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-29 08:24:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:24:36,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 08:24:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:37,014 INFO L225 Difference]: With dead ends: 1697 [2020-10-29 08:24:37,015 INFO L226 Difference]: Without dead ends: 1013 [2020-10-29 08:24:37,031 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 [2020-10-29 08:24:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-29 08:24:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-29 08:24:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-29 08:24:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-29 08:24:37,211 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 20 [2020-10-29 08:24:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:37,212 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-29 08:24:37,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:24:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-29 08:24:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 08:24:37,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:37,221 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:24:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:24:37,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2051425682, now seen corresponding path program 1 times [2020-10-29 08:24:37,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:37,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303948080] [2020-10-29 08:24:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:37,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:38,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:38,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 08:24:38,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:24:38,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1396 [2020-10-29 08:24:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:38,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:24:38,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:24:38,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:38,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:38,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 08:24:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:38,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:24:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:39,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:24:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:39,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-29 08:24:39,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:39,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:24:39,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:39,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303948080] [2020-10-29 08:24:39,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:39,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:24:39,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107815524] [2020-10-29 08:24:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:24:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:24:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:24:39,224 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-29 08:24:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:53,982 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-29 08:24:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:24:53,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-29 08:24:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:53,998 INFO L225 Difference]: With dead ends: 2964 [2020-10-29 08:24:53,999 INFO L226 Difference]: Without dead ends: 1967 [2020-10-29 08:24:54,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:24:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-29 08:24:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-29 08:24:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-29 08:24:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-29 08:24:54,095 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 91 [2020-10-29 08:24:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:54,096 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-29 08:24:54,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:24:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-29 08:24:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 08:24:54,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:54,103 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:24:54,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:24:54,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1353766561, now seen corresponding path program 1 times [2020-10-29 08:24:54,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:54,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358150518] [2020-10-29 08:24:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 08:24:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:54,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-29 08:24:54,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:24:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 08:24:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:54,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:54,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:54,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:24:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:54,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:24:54,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:54,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-29 08:24:54,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:24:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:54,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358150518] [2020-10-29 08:24:54,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:54,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:24:54,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482499719] [2020-10-29 08:24:54,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:24:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:24:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:24:54,946 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 5 states. [2020-10-29 08:25:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:09,014 INFO L93 Difference]: Finished difference Result 4732 states and 6292 transitions. [2020-10-29 08:25:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:25:09,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-29 08:25:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:09,035 INFO L225 Difference]: With dead ends: 4732 [2020-10-29 08:25:09,035 INFO L226 Difference]: Without dead ends: 2377 [2020-10-29 08:25:09,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:25:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-10-29 08:25:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2358. [2020-10-29 08:25:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2358 states. [2020-10-29 08:25:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 2901 transitions. [2020-10-29 08:25:09,130 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 2901 transitions. Word has length 94 [2020-10-29 08:25:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:09,131 INFO L481 AbstractCegarLoop]: Abstraction has 2358 states and 2901 transitions. [2020-10-29 08:25:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:25:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 2901 transitions. [2020-10-29 08:25:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-29 08:25:09,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:09,135 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:25:09,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:25:09,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1933479214, now seen corresponding path program 1 times [2020-10-29 08:25:09,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:09,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105040835] [2020-10-29 08:25:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:09,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:10,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:10,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-29 08:25:10,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-29 08:25:10,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:10,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:25:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:25:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:10,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:10,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:10,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:10,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:10,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:25:10,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:10,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:10,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:10,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:10,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:10,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:10,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:11,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:11,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:11,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:11,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 08:25:11,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:11,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:11,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:11,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:11,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:25:11,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:11,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:11,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:25:11,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-29 08:25:11,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:11,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:25:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:25:11,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105040835] [2020-10-29 08:25:11,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:11,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:25:11,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414909301] [2020-10-29 08:25:11,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:25:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:25:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:25:11,549 INFO L87 Difference]: Start difference. First operand 2358 states and 2901 transitions. Second operand 7 states. [2020-10-29 08:25:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:33,910 INFO L93 Difference]: Finished difference Result 6076 states and 7737 transitions. [2020-10-29 08:25:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:25:33,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2020-10-29 08:25:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:33,933 INFO L225 Difference]: With dead ends: 6076 [2020-10-29 08:25:33,933 INFO L226 Difference]: Without dead ends: 3724 [2020-10-29 08:25:33,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:25:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2020-10-29 08:25:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 3711. [2020-10-29 08:25:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3711 states. [2020-10-29 08:25:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 4545 transitions. [2020-10-29 08:25:34,080 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 4545 transitions. Word has length 180 [2020-10-29 08:25:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:34,082 INFO L481 AbstractCegarLoop]: Abstraction has 3711 states and 4545 transitions. [2020-10-29 08:25:34,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:25:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 4545 transitions. [2020-10-29 08:25:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-29 08:25:34,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:34,092 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:34,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:25:34,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash -694322230, now seen corresponding path program 1 times [2020-10-29 08:25:34,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:34,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356309856] [2020-10-29 08:25:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:34,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:39,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:39,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-29 08:25:39,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:25:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 08:25:39,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:39,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:25:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:25:39,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:39,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:39,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:39,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:39,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:39,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:39,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-29 08:25:39,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:39,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:25:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:25:39,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:39,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:40,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:40,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:25:40,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:40,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:25:40,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:25:40,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356309856] [2020-10-29 08:25:40,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:40,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:25:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933358367] [2020-10-29 08:25:40,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:25:40,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:25:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:25:40,326 INFO L87 Difference]: Start difference. First operand 3711 states and 4545 transitions. Second operand 10 states. [2020-10-29 08:25:40,520 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 08:25:46,113 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:26:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:06,812 INFO L93 Difference]: Finished difference Result 11239 states and 14347 transitions. [2020-10-29 08:26:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 08:26:06,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 182 [2020-10-29 08:26:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:06,852 INFO L225 Difference]: With dead ends: 11239 [2020-10-29 08:26:06,852 INFO L226 Difference]: Without dead ends: 7088 [2020-10-29 08:26:06,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-29 08:26:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2020-10-29 08:26:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 6967. [2020-10-29 08:26:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6967 states. [2020-10-29 08:26:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6967 states to 6967 states and 8187 transitions. [2020-10-29 08:26:07,045 INFO L78 Accepts]: Start accepts. Automaton has 6967 states and 8187 transitions. Word has length 182 [2020-10-29 08:26:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:07,046 INFO L481 AbstractCegarLoop]: Abstraction has 6967 states and 8187 transitions. [2020-10-29 08:26:07,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:26:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6967 states and 8187 transitions. [2020-10-29 08:26:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-29 08:26:07,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:07,049 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:07,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:26:07,050 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:07,051 INFO L82 PathProgramCache]: Analyzing trace with hash -914877184, now seen corresponding path program 1 times [2020-10-29 08:26:07,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:07,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769679686] [2020-10-29 08:26:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:08,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-29 08:26:08,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 08:26:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:08,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:08,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:08,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 08:26:08,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:08,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:08,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:08,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:08,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:08,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:26:08,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:08,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:26:08,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:26:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769679686] [2020-10-29 08:26:08,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:08,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:26:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443002518] [2020-10-29 08:26:08,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:26:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:26:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:26:08,942 INFO L87 Difference]: Start difference. First operand 6967 states and 8187 transitions. Second operand 6 states. [2020-10-29 08:26:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:25,551 INFO L93 Difference]: Finished difference Result 13934 states and 16752 transitions. [2020-10-29 08:26:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:26:25,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2020-10-29 08:26:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:25,594 INFO L225 Difference]: With dead ends: 13934 [2020-10-29 08:26:25,595 INFO L226 Difference]: Without dead ends: 7408 [2020-10-29 08:26:25,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:26:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7408 states. [2020-10-29 08:26:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7408 to 6958. [2020-10-29 08:26:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-10-29 08:26:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 8148 transitions. [2020-10-29 08:26:25,918 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 8148 transitions. Word has length 193 [2020-10-29 08:26:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:25,919 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 8148 transitions. [2020-10-29 08:26:25,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:26:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 8148 transitions. [2020-10-29 08:26:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-29 08:26:25,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:25,925 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-29 08:26:25,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:26:25,926 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash -345363260, now seen corresponding path program 1 times [2020-10-29 08:26:25,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:25,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532509681] [2020-10-29 08:26:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:27,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:29,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3875 [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:26:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 271 [2020-10-29 08:26:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:30,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:30,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:30,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:30,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 08:26:30,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:30,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:30,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:30,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:26:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:26:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:30,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:30,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:26:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:30,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:26:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:30,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:30,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:30,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:26:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-29 08:26:30,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532509681] [2020-10-29 08:26:30,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:30,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:26:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941862433] [2020-10-29 08:26:30,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:26:30,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:26:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:26:30,928 INFO L87 Difference]: Start difference. First operand 6958 states and 8148 transitions. Second operand 8 states. [2020-10-29 08:26:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:51,797 INFO L93 Difference]: Finished difference Result 19903 states and 24713 transitions. [2020-10-29 08:26:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 08:26:51,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 264 [2020-10-29 08:26:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:51,851 INFO L225 Difference]: With dead ends: 19903 [2020-10-29 08:26:51,852 INFO L226 Difference]: Without dead ends: 12913 [2020-10-29 08:26:51,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:26:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12913 states. [2020-10-29 08:26:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12913 to 12793. [2020-10-29 08:26:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12793 states. [2020-10-29 08:26:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12793 states to 12793 states and 15209 transitions. [2020-10-29 08:26:52,190 INFO L78 Accepts]: Start accepts. Automaton has 12793 states and 15209 transitions. Word has length 264 [2020-10-29 08:26:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:52,191 INFO L481 AbstractCegarLoop]: Abstraction has 12793 states and 15209 transitions. [2020-10-29 08:26:52,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:26:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 12793 states and 15209 transitions. [2020-10-29 08:26:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-29 08:26:52,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:52,197 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-29 08:26:52,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:26:52,198 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash -264858203, now seen corresponding path program 1 times [2020-10-29 08:26:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:52,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247260748] [2020-10-29 08:26:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:52,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:52,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:54,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:57,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-29 08:26:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-29 08:26:57,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:57,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:26:57,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:26:57,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:57,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:57,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:57,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:57,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:57,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:57,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:57,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:57,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:57,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:57,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 08:26:57,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:57,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:26:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:57,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:58,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:58,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:26:58,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:58,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-29 08:26:58,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:58,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:26:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:58,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:26:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:58,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:58,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:58,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-29 08:26:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:58,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:26:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:26:58,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247260748] [2020-10-29 08:26:58,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:58,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:26:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278239677] [2020-10-29 08:26:58,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:26:58,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:26:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:26:58,697 INFO L87 Difference]: Start difference. First operand 12793 states and 15209 transitions. Second operand 7 states. [2020-10-29 08:27:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:12,104 INFO L93 Difference]: Finished difference Result 27060 states and 32275 transitions. [2020-10-29 08:27:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:27:12,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 287 [2020-10-29 08:27:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:12,163 INFO L225 Difference]: With dead ends: 27060 [2020-10-29 08:27:12,163 INFO L226 Difference]: Without dead ends: 14708 [2020-10-29 08:27:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:27:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14708 states. [2020-10-29 08:27:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14708 to 14645. [2020-10-29 08:27:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14645 states. [2020-10-29 08:27:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14645 states to 14645 states and 17381 transitions. [2020-10-29 08:27:12,553 INFO L78 Accepts]: Start accepts. Automaton has 14645 states and 17381 transitions. Word has length 287 [2020-10-29 08:27:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:12,554 INFO L481 AbstractCegarLoop]: Abstraction has 14645 states and 17381 transitions. [2020-10-29 08:27:12,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:27:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14645 states and 17381 transitions. [2020-10-29 08:27:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 08:27:12,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:12,563 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-29 08:27:12,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:27:12,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1565960645, now seen corresponding path program 1 times [2020-10-29 08:27:12,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:12,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787034397] [2020-10-29 08:27:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:12,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:17,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:17,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 08:27:17,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:27:17,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 08:27:17,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:17,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:27:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-29 08:27:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:17,955 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:17,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:17,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:17,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:17,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:17,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:18,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:18,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:18,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:18,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:18,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:27:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:18,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:18,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 08:27:18,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:18,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-29 08:27:18,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:18,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-29 08:27:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:19,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-29 08:27:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:19,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:27:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:19,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 41 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:27:19,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787034397] [2020-10-29 08:27:19,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:19,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:27:19,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375683380] [2020-10-29 08:27:19,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:27:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:27:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:27:19,598 INFO L87 Difference]: Start difference. First operand 14645 states and 17381 transitions. Second operand 10 states. [2020-10-29 08:27:19,878 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-29 08:27:26,556 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-29 08:27:33,788 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-29 08:27:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:39,567 INFO L93 Difference]: Finished difference Result 29602 states and 35463 transitions. [2020-10-29 08:27:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 08:27:39,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 311 [2020-10-29 08:27:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:39,638 INFO L225 Difference]: With dead ends: 29602 [2020-10-29 08:27:39,638 INFO L226 Difference]: Without dead ends: 15398 [2020-10-29 08:27:39,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-29 08:27:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15398 states. [2020-10-29 08:27:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15398 to 15173. [2020-10-29 08:27:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15173 states. [2020-10-29 08:27:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15173 states to 15173 states and 18004 transitions. [2020-10-29 08:27:40,100 INFO L78 Accepts]: Start accepts. Automaton has 15173 states and 18004 transitions. Word has length 311 [2020-10-29 08:27:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:40,101 INFO L481 AbstractCegarLoop]: Abstraction has 15173 states and 18004 transitions. [2020-10-29 08:27:40,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:27:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15173 states and 18004 transitions. [2020-10-29 08:27:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-29 08:27:40,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:40,111 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-29 08:27:40,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:27:40,112 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 399877341, now seen corresponding path program 1 times [2020-10-29 08:27:40,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:40,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974054009] [2020-10-29 08:27:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:45,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 384 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-29 08:27:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 08:27:45,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:45,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:45,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:45,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:27:45,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:45,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:45,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:45,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:45,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:45,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:45,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:45,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:45,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:45,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:45,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:27:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-29 08:27:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:45,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:27:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:45,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:27:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:45,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:45,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:45,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:45,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 08:27:45,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:46,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2020-10-29 08:27:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:46,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:46,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:46,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:27:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 228 proven. 70 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-29 08:27:46,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974054009] [2020-10-29 08:27:46,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:27:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069317180] [2020-10-29 08:27:46,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:46,228 INFO L87 Difference]: Start difference. First operand 15173 states and 18004 transitions. Second operand 7 states.