/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/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:51:45,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:51:45,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:51:45,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:51:45,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:51:45,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:51:45,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:51:45,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:51:45,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:51:45,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:51:45,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:51:45,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:51:45,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:51:45,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:51:45,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:51:45,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:51:45,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:51:45,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:51:45,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:51:45,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:51:45,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:51:45,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:51:45,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:51:45,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:51:45,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:51:45,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:51:45,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:51:45,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:51:45,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:51:45,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:51:45,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:51:45,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:51:45,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:51:45,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:51:45,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:51:45,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:51:45,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:51:45,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:51:45,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:51:45,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:51:45,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:51:45,181 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 09:51:45,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:51:45,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:51:45,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:51:45,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:51:45,211 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:51:45,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:51:45,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:51:45,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:51:45,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:51:45,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:51:45,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:51:45,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:51:45,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:51:45,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:51:45,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:51:45,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:51:45,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:51:45,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:51:45,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:51:45,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:51:45,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:51:45,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:51:45,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:51:45,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:51:45,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:51:45,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:51:45,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:51:45,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:51:45,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:51:45,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:51:45,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:51:45,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:51:45,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:51:45,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:51:45,625 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:51:45,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2020-10-29 09:51:45,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79795bb22/9a1fb1a0a3b54ea58c64b05f052dddca/FLAG1b75511c4 [2020-10-29 09:51:46,389 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:51:46,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2020-10-29 09:51:46,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79795bb22/9a1fb1a0a3b54ea58c64b05f052dddca/FLAG1b75511c4 [2020-10-29 09:51:46,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79795bb22/9a1fb1a0a3b54ea58c64b05f052dddca [2020-10-29 09:51:46,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:51:46,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:51:46,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:51:46,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:51:46,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:51:46,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:51:46" (1/1) ... [2020-10-29 09:51:46,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efdc3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:46, skipping insertion in model container [2020-10-29 09:51:46,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:51:46" (1/1) ... [2020-10-29 09:51:46,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:51:46,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:51:47,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:51:47,027 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:51:47,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:51:47,058 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:51:47,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47 WrapperNode [2020-10-29 09:51:47,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:51:47,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:51:47,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:51:47,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:51:47,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (1/1) ... [2020-10-29 09:51:47,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:51:47,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:51:47,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:51:47,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:51:47,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (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 09:51:47,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:51:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:51:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:51:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:51:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:51:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:51:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:51:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:51:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:51:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:51:47,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:51:47,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:51:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:51:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:51:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:51:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:51:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:51:47,462 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:51:47,462 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:51:47,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:51:47 BoogieIcfgContainer [2020-10-29 09:51:47,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:51:47,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:51:47,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:51:47,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:51:47,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:51:46" (1/3) ... [2020-10-29 09:51:47,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e00001b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:51:47, skipping insertion in model container [2020-10-29 09:51:47,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:51:47" (2/3) ... [2020-10-29 09:51:47,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e00001b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:51:47, skipping insertion in model container [2020-10-29 09:51:47,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:51:47" (3/3) ... [2020-10-29 09:51:47,478 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2020-10-29 09:51:47,496 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:51:47,503 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:51:47,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:51:47,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:51:47,578 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:51:47,578 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:51:47,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:51:47,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:51:47,579 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:51:47,579 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:51:47,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:51:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:51:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:51:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:47,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:47,610 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-29 09:51:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:47,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100771599] [2020-10-29 09:51:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:51:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-29 09:51:48,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:51:48,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:51:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:48,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:48,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:48,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:48,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:51:48,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:48,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:48,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:48,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:48,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:48,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:51:48,492 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 09:51:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100771599] [2020-10-29 09:51:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:51:48,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:51:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681631631] [2020-10-29 09:51:48,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:51:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:51:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:51:48,527 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 09:51:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:48,831 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-10-29 09:51:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:51:48,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-29 09:51:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:48,841 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:51:48,841 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:51:48,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:51:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:51:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-29 09:51:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:51:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-29 09:51:48,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-29 09:51:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:48,888 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-29 09:51:48,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:51:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-29 09:51:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:51:48,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:48,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:48,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:51:48,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:48,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1532107848, now seen corresponding path program 1 times [2020-10-29 09:51:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:48,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613201236] [2020-10-29 09:51:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:48,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:49,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:51:49,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:51:49,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-29 09:51:49,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:49,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:51:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:51:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:51:49,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:49,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:49,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:49,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:49,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:51:49,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:49,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:49,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:49,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:51:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:49,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613201236] [2020-10-29 09:51:49,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:49,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:51:49,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235186993] [2020-10-29 09:51:49,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:51:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:51:49,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:51:49,568 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-10-29 09:51:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:49,868 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-29 09:51:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:51:49,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:51:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:49,870 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:51:49,870 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:51:49,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:51:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:51:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-29 09:51:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:51:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-29 09:51:49,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-29 09:51:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:49,880 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-29 09:51:49,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:51:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-29 09:51:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:51:49,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:49,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:49,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:51:49,881 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-10-29 09:51:49,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:49,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981836292] [2020-10-29 09:51:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:49,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:50,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:51:50,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:51:50,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-29 09:51:50,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:50,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:51:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:51:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:50,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:50,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:50,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:50,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:51:50,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:50,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:50,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:50,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:50,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:50,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:51:50,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981836292] [2020-10-29 09:51:50,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:50,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:51:50,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877704436] [2020-10-29 09:51:50,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:51:50,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:51:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:51:50,491 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-10-29 09:51:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:50,821 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-29 09:51:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:51:50,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-29 09:51:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:50,822 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:51:50,822 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:51:50,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:51:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:51:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-29 09:51:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:51:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-29 09:51:50,831 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-29 09:51:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:50,831 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-29 09:51:50,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:51:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-29 09:51:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:51:50,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:50,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:50,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:51:50,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1137549224, now seen corresponding path program 2 times [2020-10-29 09:51:50,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:50,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760547060] [2020-10-29 09:51:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:50,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:51,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:51:51,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:51,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-29 09:51:51,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:51,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:51:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:51:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:51,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:51:51,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:51,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:51,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:51,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:51:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:51:51,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760547060] [2020-10-29 09:51:51,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:51,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:51:51,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300613489] [2020-10-29 09:51:51,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:51:51,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:51:51,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:51:51,597 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-10-29 09:51:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:52,005 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-29 09:51:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:51:52,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-29 09:51:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:52,007 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:51:52,007 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:51:52,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:51:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:51:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:51:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:51:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-29 09:51:52,022 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-10-29 09:51:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:52,022 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-29 09:51:52,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:51:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-29 09:51:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:51:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:52,024 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:52,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:51:52,025 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:52,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1586194961, now seen corresponding path program 3 times [2020-10-29 09:51:52,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:52,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537572169] [2020-10-29 09:51:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:52,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:52,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:51:52,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:52,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-29 09:51:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:52,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:51:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:51:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:53,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:53,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:51:53,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:53,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:53,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:53,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:53,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:53,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:53,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537572169] [2020-10-29 09:51:53,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:53,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:51:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913277403] [2020-10-29 09:51:53,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:51:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:51:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:51:53,024 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-10-29 09:51:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:53,403 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-29 09:51:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:51:53,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:51:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:53,405 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:51:53,405 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:51:53,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:51:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:51:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-29 09:51:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:51:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-29 09:51:53,418 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-10-29 09:51:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:53,419 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-29 09:51:53,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:51:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-29 09:51:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:51:53,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:53,420 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:53,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:51:53,420 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -719509078, now seen corresponding path program 4 times [2020-10-29 09:51:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:53,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342491580] [2020-10-29 09:51:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:54,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:58,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:58,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:51:58,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:51:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:51:58,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:58,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:51:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:51:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:00,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:00,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:00,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:00,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:00,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:00,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:52:00,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342491580] [2020-10-29 09:52:00,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:00,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:52:00,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618842182] [2020-10-29 09:52:00,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:52:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:52:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2020-10-29 09:52:00,858 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-29 09:52:03,473 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 09:52:03,632 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 09:52:03,833 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-29 09:52:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:04,622 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-10-29 09:52:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:52:04,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-29 09:52:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:04,626 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:52:04,626 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:52:04,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=130, Invalid=249, Unknown=1, NotChecked=0, Total=380 [2020-10-29 09:52:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:52:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-29 09:52:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:52:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-29 09:52:04,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2020-10-29 09:52:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:04,647 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-29 09:52:04,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:52:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-29 09:52:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:52:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:04,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:04,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:52:04,649 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1436059855, now seen corresponding path program 5 times [2020-10-29 09:52:04,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:04,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052605861] [2020-10-29 09:52:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:09,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:09,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:52:09,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:09,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:52:09,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:10,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:10,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:52:10,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052605861] [2020-10-29 09:52:10,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:10,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:52:10,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629628222] [2020-10-29 09:52:10,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:52:10,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:10,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:52:10,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:10,162 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-29 09:52:11,251 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-29 09:52:11,449 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 09:52:11,670 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-29 09:52:11,880 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-29 09:52:14,689 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-29 09:52:18,798 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 09:52:28,001 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-29 09:52:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:37,010 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-29 09:52:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:52:37,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-29 09:52:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:37,012 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:52:37,013 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:52:37,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=192, Invalid=409, Unknown=3, NotChecked=46, Total=650 [2020-10-29 09:52:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:52:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-29 09:52:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:52:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-29 09:52:37,026 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 36 [2020-10-29 09:52:37,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:37,027 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-29 09:52:37,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:52:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-29 09:52:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:52:37,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:37,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:37,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:52:37,029 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -360866934, now seen corresponding path program 6 times [2020-10-29 09:52:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:37,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869856977] [2020-10-29 09:52:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:42,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:42,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:52:42,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:52:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:42,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:42,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:42,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:52:42,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869856977] [2020-10-29 09:52:42,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:42,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:52:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665547581] [2020-10-29 09:52:42,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:52:42,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:52:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:42,264 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 11 states. [2020-10-29 09:52:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:42,824 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-29 09:52:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:52:42,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-29 09:52:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:42,825 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:52:42,825 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:52:42,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:52:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:52:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-29 09:52:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:52:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-29 09:52:42,843 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2020-10-29 09:52:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:42,843 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-29 09:52:42,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:52:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-29 09:52:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:52:42,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:42,848 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:42,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:52:42,848 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -361502518, now seen corresponding path program 7 times [2020-10-29 09:52:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383838596] [2020-10-29 09:52:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:47,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:52:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:52,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:52,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:52,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:52,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:52,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:52,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:52,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 09:52:52,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383838596] [2020-10-29 09:52:52,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:52,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:52:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19962608] [2020-10-29 09:52:52,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:52:52,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:52:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=84, Unknown=2, NotChecked=0, Total=110 [2020-10-29 09:52:52,359 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 11 states. [2020-10-29 09:52:52,896 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 09:52:53,048 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 09:52:53,261 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-29 09:52:53,455 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-29 09:52:53,770 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-29 09:52:54,006 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-29 09:52:54,375 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-29 09:52:54,626 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-29 09:52:54,858 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-29 09:52:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:57,441 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-10-29 09:52:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:52:57,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-29 09:52:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:57,445 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:52:57,445 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:52:57,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=238, Invalid=515, Unknown=3, NotChecked=0, Total=756 [2020-10-29 09:52:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:52:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2020-10-29 09:52:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:52:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-29 09:52:57,462 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 51 [2020-10-29 09:52:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:57,462 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-29 09:52:57,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:52:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-29 09:52:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:52:57,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:57,464 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:57,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:52:57,464 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1889274449, now seen corresponding path program 8 times [2020-10-29 09:52:57,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:57,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809249422] [2020-10-29 09:52:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:01,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:02,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:53:02,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:07,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:07,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:07,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:07,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:07,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 204 refuted. 6 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 09:53:07,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809249422] [2020-10-29 09:53:07,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:07,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:53:07,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515572383] [2020-10-29 09:53:07,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:53:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:53:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=102, Unknown=2, NotChecked=0, Total=132 [2020-10-29 09:53:07,027 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 12 states. [2020-10-29 09:53:07,661 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 09:53:07,824 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 09:53:08,132 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-29 09:53:08,292 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-29 09:53:08,643 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-29 09:53:09,174 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-29 09:53:11,879 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-29 09:53:12,078 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-10-29 09:53:12,922 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-29 09:53:13,458 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-29 09:53:15,879 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-29 09:53:16,136 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-29 09:53:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:17,207 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-29 09:53:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:53:17,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-29 09:53:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:17,213 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:53:17,213 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:53:17,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=305, Invalid=685, Unknown=2, NotChecked=0, Total=992 [2020-10-29 09:53:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:53:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-10-29 09:53:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:53:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-29 09:53:17,230 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 54 [2020-10-29 09:53:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:17,230 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-29 09:53:17,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:53:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-29 09:53:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:53:17,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:17,232 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:17,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:53:17,232 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1974435158, now seen corresponding path program 9 times [2020-10-29 09:53:17,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:17,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020897443] [2020-10-29 09:53:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:22,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:22,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:53:22,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 09:53:22,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:53:22,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:22,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:53:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:53:22,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:39,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:39,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 241 refuted. 12 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 09:53:39,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020897443] [2020-10-29 09:53:39,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:39,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:53:39,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280919222] [2020-10-29 09:53:39,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:53:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:39,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:53:39,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=117, Unknown=8, NotChecked=0, Total=156 [2020-10-29 09:53:39,452 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 13 states. [2020-10-29 09:53:42,254 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-29 09:53:42,446 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 09:53:42,751 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 09:53:43,035 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 09:53:43,470 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-29 09:53:44,095 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-29 09:53:44,957 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-29 09:53:45,290 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-29 09:53:46,872 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-29 09:53:47,353 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-29 09:53:48,106 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-29 09:53:50,612 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-29 09:53:51,229 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-29 09:53:52,495 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 09:53:52,885 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 09:53:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:55,479 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-29 09:53:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:53:55,480 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-29 09:53:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:55,482 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:53:55,482 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:53:55,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=377, Invalid=875, Unknown=8, NotChecked=0, Total=1260 [2020-10-29 09:53:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:53:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2020-10-29 09:53:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:53:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-29 09:53:55,506 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 57 [2020-10-29 09:53:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:55,509 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-29 09:53:55,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:53:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-29 09:53:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:53:55,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:55,510 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:55,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:53:55,511 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -671445041, now seen corresponding path program 10 times [2020-10-29 09:53:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:55,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576381117] [2020-10-29 09:53:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:57,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:57,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:00,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:54:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:54:00,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:03,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 296 refuted. 3 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 09:54:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576381117] [2020-10-29 09:54:03,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:03,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:54:03,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237569902] [2020-10-29 09:54:03,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:54:03,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:54:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2020-10-29 09:54:03,125 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 14 states. [2020-10-29 09:54:03,784 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-29 09:54:03,979 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 09:54:04,221 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 09:54:04,467 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 09:54:06,857 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-29 09:54:07,221 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-29 09:54:08,343 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-29 09:54:09,080 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-29 09:54:10,003 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-29 09:54:11,147 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-29 09:54:15,470 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-29 09:54:16,896 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-29 09:54:17,647 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2020-10-29 09:54:18,664 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-29 09:54:22,760 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-29 09:54:23,617 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-29 09:54:24,090 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 09:54:24,622 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 09:54:30,354 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-29 09:54:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:34,774 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-29 09:54:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:54:34,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-29 09:54:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:34,775 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:54:34,775 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:54:34,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=495, Invalid=1142, Unknown=3, NotChecked=0, Total=1640 [2020-10-29 09:54:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:54:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2020-10-29 09:54:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:54:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-29 09:54:34,798 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 60 [2020-10-29 09:54:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:34,799 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-29 09:54:34,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:54:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-29 09:54:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:54:34,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:34,800 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:34,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:54:34,801 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1207290742, now seen corresponding path program 11 times [2020-10-29 09:54:34,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:34,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433709516] [2020-10-29 09:54:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:35,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:35,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:39,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:39,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:39,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:54:39,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:54:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:40,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:40,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 09:54:40,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433709516] [2020-10-29 09:54:40,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:40,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:54:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032304448] [2020-10-29 09:54:40,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:54:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:54:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:54:40,633 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 15 states. [2020-10-29 09:54:43,477 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-29 09:54:45,686 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 62 [2020-10-29 09:54:52,594 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-29 09:54:52,927 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-29 09:54:55,389 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-29 09:54:55,692 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-29 09:54:57,798 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-29 09:55:04,418 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-29 09:55:05,179 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-29 09:55:08,397 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-29 09:55:10,982 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-29 09:55:11,723 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-29 09:55:20,206 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-29 09:55:22,646 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-10-29 09:55:26,288 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-29 09:55:28,359 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= 3 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999998)) 4294967296)) c_main_~x~0)) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (<= 1 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 5000000)) 4294967296)))) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)))) (<= 8 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))))) is different from false [2020-10-29 09:55:32,494 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-29 09:55:42,649 WARN L193 SmtUtils]: Spent 9.84 s on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2020-10-29 09:55:48,216 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-29 09:55:59,142 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 103 DAG size of output: 54