/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/ms2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:38:23,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:38:23,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:38:23,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:38:23,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:38:23,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:38:23,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:38:23,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:38:23,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:38:23,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:38:23,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:38:23,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:38:23,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:38:23,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:38:23,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:38:23,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:38:23,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:38:23,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:38:23,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:38:23,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:38:23,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:38:23,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:38:23,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:38:24,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:38:24,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:38:24,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:38:24,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:38:24,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:38:24,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:38:24,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:38:24,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:38:24,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:38:24,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:38:24,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:38:24,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:38:24,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:38:24,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:38:24,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:38:24,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:38:24,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:38:24,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:38:24,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:38:24,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:38:24,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:38:24,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:38:24,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:38:24,107 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:38:24,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:38:24,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:38:24,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:38:24,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:38:24,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:38:24,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:38:24,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:38:24,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:38:24,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:38:24,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:38:24,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:38:24,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:38:24,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:38:24,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:38:24,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:38:24,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:38:24,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:24,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:38:24,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:38:24,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:38:24,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:38:24,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:38:24,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:38:24,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:38:24,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:38:24,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:38:24,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:38:24,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:38:24,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:38:24,573 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:38:24,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2.c [2020-10-26 19:38:24,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/999e38906/882496004ad34f588927bb27324a1046/FLAG357dad06d [2020-10-26 19:38:25,297 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:38:25,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms2.c [2020-10-26 19:38:25,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/999e38906/882496004ad34f588927bb27324a1046/FLAG357dad06d [2020-10-26 19:38:25,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/999e38906/882496004ad34f588927bb27324a1046 [2020-10-26 19:38:25,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:38:25,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:38:25,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:25,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:38:25,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:38:25,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:25,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66eb2dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25, skipping insertion in model container [2020-10-26 19:38:25,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:25,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:38:25,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:38:25,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:25,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:38:25,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:25,988 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:38:25,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25 WrapperNode [2020-10-26 19:38:25,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:25,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:38:25,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:38:25,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:38:26,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... [2020-10-26 19:38:26,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:38:26,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:38:26,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:38:26,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:38:26,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:26,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:38:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:38:26,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:38:26,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:38:26,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:38:26,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:38:26,193 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:38:26,193 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:38:26,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:38:26,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:38:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:38:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:38:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:38:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:38:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:38:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:38:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:38:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:38:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:38:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:38:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:38:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:38:26,674 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:38:26,675 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:38:26,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:26 BoogieIcfgContainer [2020-10-26 19:38:26,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:38:26,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:38:26,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:38:26,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:38:26,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:38:25" (1/3) ... [2020-10-26 19:38:26,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:26, skipping insertion in model container [2020-10-26 19:38:26,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:25" (2/3) ... [2020-10-26 19:38:26,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:26, skipping insertion in model container [2020-10-26 19:38:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:26" (3/3) ... [2020-10-26 19:38:26,687 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2.c [2020-10-26 19:38:26,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:38:26,705 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:38:26,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:38:26,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:38:26,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:38:26,749 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:38:26,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:38:26,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:38:26,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:38:26,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:38:26,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:38:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:38:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:38:26,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:26,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:26,776 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-26 19:38:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:26,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059449599] [2020-10-26 19:38:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:38:27,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:27,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-26 19:38:27,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:38:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:38:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:38:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:27,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:27,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:27,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:38:27,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:27,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:38:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059449599] [2020-10-26 19:38:27,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:27,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:38:27,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321192747] [2020-10-26 19:38:27,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:38:27,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:27,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:38:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:38:27,808 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-26 19:38:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:28,070 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-26 19:38:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:38:28,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:38:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:28,081 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:38:28,081 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:38:28,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:38:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:38:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:38:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:38:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 19:38:28,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-26 19:38:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:28,133 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 19:38:28,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:38:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 19:38:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:28,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:28,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:28,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:38:28,135 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-26 19:38:28,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:28,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032519943] [2020-10-26 19:38:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:29,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:29,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:29,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-26 19:38:29,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:38:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:38:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:29,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:29,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:29,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:29,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:38:29,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:29,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:29,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:29,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:29,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:29,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:29,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:29,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:29,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:29,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032519943] [2020-10-26 19:38:29,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:29,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:38:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982539436] [2020-10-26 19:38:29,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:38:29,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:38:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:38:29,258 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-26 19:38:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:29,645 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-26 19:38:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:38:29,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-26 19:38:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:29,648 INFO L225 Difference]: With dead ends: 38 [2020-10-26 19:38:29,648 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:38:29,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:38:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-26 19:38:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:38:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 19:38:29,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-26 19:38:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:29,662 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 19:38:29,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:38:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 19:38:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:29,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:29,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:38:29,664 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-26 19:38:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737251606] [2020-10-26 19:38:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:30,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:30,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-26 19:38:30,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:38:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:30,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:38:30,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:30,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:30,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:30,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:30,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:38:30,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:30,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:30,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737251606] [2020-10-26 19:38:30,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:30,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:30,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071461520] [2020-10-26 19:38:30,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:30,953 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-26 19:38:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:31,290 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-26 19:38:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:38:31,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-26 19:38:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:31,292 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:38:31,292 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:38:31,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:38:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:38:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:38:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 19:38:31,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-26 19:38:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:31,303 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 19:38:31,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 19:38:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:38:31,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:31,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:31,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:38:31,305 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1079019474, now seen corresponding path program 1 times [2020-10-26 19:38:31,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:31,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687985622] [2020-10-26 19:38:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:38:35,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:38:35,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4586 [2020-10-26 19:38:35,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:38:35,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:35,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:38:35,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:36,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:36,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:36,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:36,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:36,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:36,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:36,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687985622] [2020-10-26 19:38:36,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:36,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:38:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008096557] [2020-10-26 19:38:36,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:38:36,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:36,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:38:36,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:38:36,495 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-26 19:38:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:37,440 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 19:38:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:37,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-26 19:38:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:37,442 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:38:37,442 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:38:37,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:38:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:38:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:38:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:38:37,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-26 19:38:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:37,453 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:38:37,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:38:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:38:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:38:37,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:37,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:37,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:38:37,456 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:37,456 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 2 times [2020-10-26 19:38:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:37,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317243112] [2020-10-26 19:38:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:42,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:38:42,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:38:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:38:42,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:38:42,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:42,813 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-10-26 19:38:42,972 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-10-26 19:38:43,281 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 40 [2020-10-26 19:38:43,403 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-26 19:38:43,632 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-26 19:38:43,837 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-26 19:38:44,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:44,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:44,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:44,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:44,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:44,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:44,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:44,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:44,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:44,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:44,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:44,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:44,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317243112] [2020-10-26 19:38:44,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:44,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:44,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337836518] [2020-10-26 19:38:44,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:44,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:44,358 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 19 states. [2020-10-26 19:38:44,761 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-26 19:38:45,012 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-26 19:38:45,190 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-26 19:38:45,375 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-26 19:38:45,793 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 89 [2020-10-26 19:38:46,111 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-26 19:38:46,421 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-10-26 19:38:46,602 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-26 19:38:46,811 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-26 19:38:47,041 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-26 19:38:47,337 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-26 19:38:47,564 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-26 19:38:48,031 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-26 19:38:48,435 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-26 19:38:48,735 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-26 19:38:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:48,902 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-26 19:38:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:38:48,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-26 19:38:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:48,909 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:38:48,909 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:38:48,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:38:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:38:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-26 19:38:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:38:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:38:48,931 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2020-10-26 19:38:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:48,932 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:38:48,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:38:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:38:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:38:48,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:48,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:48,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:38:48,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 3 times [2020-10-26 19:38:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:48,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844336246] [2020-10-26 19:38:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:53,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:38:53,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:38:53,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:38:53,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:38:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:38:53,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:54,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:54,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:54,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:54,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:38:54,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844336246] [2020-10-26 19:38:54,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:54,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769445735] [2020-10-26 19:38:54,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:54,494 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 16 states. [2020-10-26 19:38:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:55,578 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-26 19:38:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:55,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-26 19:38:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:55,581 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:38:55,582 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:38:55,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:38:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:38:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-26 19:38:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:38:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:38:55,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2020-10-26 19:38:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:55,594 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:38:55,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:38:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:38:55,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:55,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:55,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:38:55,604 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2100240974, now seen corresponding path program 4 times [2020-10-26 19:38:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:55,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353556801] [2020-10-26 19:38:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:55,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:00,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:39:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:39:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:00,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:39:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:39:00,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:00,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:00,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:39:00,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:00,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:00,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:00,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:00,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:00,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:00,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:39:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:39:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353556801] [2020-10-26 19:39:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:39:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265273815] [2020-10-26 19:39:00,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:39:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:39:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:39:00,952 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2020-10-26 19:39:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:01,636 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-26 19:39:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:39:01,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-26 19:39:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:01,646 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:39:01,647 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:39:01,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:39:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:39:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-26 19:39:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:39:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:39:01,676 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2020-10-26 19:39:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:01,679 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:39:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:39:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:39:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:39:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:01,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:01,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:39:01,681 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 5 times [2020-10-26 19:39:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:01,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043083022] [2020-10-26 19:39:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:06,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:39:06,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:39:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:06,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:06,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:06,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:06,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:06,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:39:06,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:06,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:06,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:06,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:06,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:39:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:07,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:07,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:07,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:07,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:07,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:07,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043083022] [2020-10-26 19:39:07,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:07,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679582770] [2020-10-26 19:39:07,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:07,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:07,025 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-10-26 19:39:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:07,999 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:39:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:39:08,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:39:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:08,002 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:39:08,002 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:39:08,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:39:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:39:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-26 19:39:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:39:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-26 19:39:08,031 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2020-10-26 19:39:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-26 19:39:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-26 19:39:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:39:08,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:08,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:08,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:39:08,033 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 6 times [2020-10-26 19:39:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528507210] [2020-10-26 19:39:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:39:13,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:39:13,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:39:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:39:13,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:13,642 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 27 [2020-10-26 19:39:13,775 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-26 19:39:14,105 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2020-10-26 19:39:14,243 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:39:14,863 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2020-10-26 19:39:15,403 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2020-10-26 19:39:15,844 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 60 [2020-10-26 19:39:16,094 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-10-26 19:39:16,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:16,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:16,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:16,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:16,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:16,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:16,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:16,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528507210] [2020-10-26 19:39:16,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:16,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:39:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582042073] [2020-10-26 19:39:16,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:39:16,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:16,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:39:16,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:39:16,810 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 23 states. [2020-10-26 19:39:17,456 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-10-26 19:39:17,719 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-26 19:39:18,119 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-26 19:39:18,469 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:39:18,669 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-26 19:39:19,453 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 130 [2020-10-26 19:39:20,144 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2020-10-26 19:39:21,151 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2020-10-26 19:39:21,571 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-10-26 19:39:21,902 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-26 19:39:22,104 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:39:22,406 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-26 19:39:22,810 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-26 19:39:23,385 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-26 19:39:24,259 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2020-10-26 19:39:24,884 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2020-10-26 19:39:25,500 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-10-26 19:39:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:25,779 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-26 19:39:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:39:25,780 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-26 19:39:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:25,782 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:25,782 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:39:25,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=348, Invalid=2202, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:39:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:39:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-26 19:39:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-26 19:39:25,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2020-10-26 19:39:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:25,803 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-26 19:39:25,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:39:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-26 19:39:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:39:25,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:25,805 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:25,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:39:25,805 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1286510121, now seen corresponding path program 7 times [2020-10-26 19:39:25,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:25,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578362662] [2020-10-26 19:39:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:39:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:31,378 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-26 19:39:31,674 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-26 19:39:31,836 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-26 19:39:32,006 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-26 19:39:32,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:32,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:32,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:32,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:32,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:32,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:32,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:32,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:32,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:32,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:32,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:32,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:39:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578362662] [2020-10-26 19:39:32,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:32,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:39:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193635665] [2020-10-26 19:39:32,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:39:32,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:39:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:39:32,498 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 20 states. [2020-10-26 19:39:32,852 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-26 19:39:33,046 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 19:39:33,320 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-26 19:39:33,747 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-26 19:39:33,896 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-26 19:39:34,194 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-26 19:39:34,349 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-26 19:39:34,570 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-26 19:39:34,804 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-26 19:39:35,001 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:39:35,164 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-26 19:39:35,417 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 19:39:35,635 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:39:35,881 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:39:36,183 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-26 19:39:36,475 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-26 19:39:36,751 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-26 19:39:37,066 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 19:39:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:37,228 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-26 19:39:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:39:37,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-26 19:39:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:37,231 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:39:37,231 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:39:37,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:39:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:39:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-26 19:39:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:39:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:39:37,251 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 43 [2020-10-26 19:39:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:37,251 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:39:37,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:39:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:39:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:39:37,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:37,253 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:37,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:39:37,253 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-26 19:39:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:37,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106503716] [2020-10-26 19:39:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:42,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:43,025 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-10-26 19:39:43,385 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-26 19:39:43,633 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-10-26 19:39:43,977 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 62 [2020-10-26 19:39:44,188 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-26 19:39:44,873 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2020-10-26 19:39:45,299 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-26 19:39:45,603 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 67 [2020-10-26 19:39:45,849 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-26 19:39:46,182 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-10-26 19:39:46,361 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-26 19:39:47,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:47,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:47,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:47,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:47,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106503716] [2020-10-26 19:39:47,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:47,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:39:47,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195543312] [2020-10-26 19:39:47,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:39:47,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:47,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:39:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:39:47,200 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 27 states. [2020-10-26 19:39:48,338 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 111 [2020-10-26 19:39:49,263 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 120 [2020-10-26 19:39:49,565 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-26 19:39:49,867 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-26 19:39:50,124 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-26 19:39:50,479 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-26 19:39:50,714 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:39:51,065 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2020-10-26 19:39:51,418 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-26 19:39:53,431 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 216 DAG size of output: 179 [2020-10-26 19:39:54,572 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 171 DAG size of output: 129 [2020-10-26 19:39:56,225 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 203 DAG size of output: 157 [2020-10-26 19:39:56,968 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2020-10-26 19:39:57,506 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-26 19:39:57,762 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 19:39:58,141 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-26 19:39:59,000 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 112 [2020-10-26 19:39:59,237 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:39:59,563 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-26 19:40:00,000 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-26 19:40:00,496 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-26 19:40:00,707 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-26 19:40:02,288 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-26 19:40:03,648 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 144 DAG size of output: 139 [2020-10-26 19:40:05,124 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2020-10-26 19:40:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:05,356 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:40:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:40:05,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-26 19:40:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:05,359 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:40:05,359 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:40:05,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=452, Invalid=3088, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:40:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:40:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-26 19:40:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:40:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-26 19:40:05,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 45 [2020-10-26 19:40:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:05,378 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-26 19:40:05,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:40:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-26 19:40:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:40:05,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:05,379 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:40:05,379 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -386933268, now seen corresponding path program 9 times [2020-10-26 19:40:05,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:05,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798155333] [2020-10-26 19:40:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:07,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:08,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:40:10,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:10,659 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 29 [2020-10-26 19:40:10,929 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2020-10-26 19:40:11,136 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 37 [2020-10-26 19:40:11,484 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 39 [2020-10-26 19:40:11,668 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-26 19:40:12,173 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-10-26 19:40:12,557 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-26 19:40:12,926 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2020-10-26 19:40:13,251 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-26 19:40:13,629 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-26 19:40:13,793 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-26 19:40:13,952 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 19:40:14,091 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 19:40:14,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:14,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:40:14,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798155333] [2020-10-26 19:40:14,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:14,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:40:14,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047876105] [2020-10-26 19:40:14,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:40:14,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:40:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:40:14,562 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 25 states. [2020-10-26 19:40:15,516 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-26 19:40:15,837 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-26 19:40:16,313 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-26 19:40:16,498 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-26 19:40:16,940 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-26 19:40:17,282 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-26 19:40:19,099 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 156 DAG size of output: 134 [2020-10-26 19:40:19,825 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-26 19:40:21,084 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 160 DAG size of output: 129 [2020-10-26 19:40:21,557 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-26 19:40:22,168 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-10-26 19:40:22,589 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-26 19:40:22,961 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-26 19:40:23,774 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 132 [2020-10-26 19:40:24,094 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-26 19:40:24,608 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-26 19:40:25,534 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-26 19:40:26,025 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 19:40:26,318 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-26 19:40:26,924 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-10-26 19:40:28,073 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2020-10-26 19:40:29,155 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 147 [2020-10-26 19:40:30,262 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2020-10-26 19:40:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:30,646 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-26 19:40:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:40:30,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-26 19:40:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:30,648 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:40:30,649 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:40:30,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:40:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:40:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-26 19:40:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:40:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-26 19:40:30,666 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 48 [2020-10-26 19:40:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:30,666 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-26 19:40:30,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:40:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-26 19:40:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:40:30,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:30,667 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:30,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:40:30,668 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1913889322, now seen corresponding path program 10 times [2020-10-26 19:40:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:30,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252872923] [2020-10-26 19:40:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:35,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:35,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:40:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:36,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:36,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:40:36,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252872923] [2020-10-26 19:40:36,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:36,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:40:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730595289] [2020-10-26 19:40:36,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:40:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:40:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:40:36,197 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 19 states. [2020-10-26 19:40:36,617 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-26 19:40:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:37,773 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2020-10-26 19:40:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:40:37,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:40:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:37,775 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:40:37,776 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:40:37,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:40:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:40:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-26 19:40:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:40:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-26 19:40:37,790 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 48 [2020-10-26 19:40:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:37,790 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-26 19:40:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:40:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-26 19:40:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:40:37,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:37,791 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:37,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:40:37,791 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 11 times [2020-10-26 19:40:37,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:37,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494613111] [2020-10-26 19:40:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:40:42,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:40:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:43,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:43,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:43,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:43,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:43,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:43,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:43,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:43,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:43,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494613111] [2020-10-26 19:40:43,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:43,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:40:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888573305] [2020-10-26 19:40:43,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:40:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:40:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:40:43,567 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 22 states. [2020-10-26 19:40:44,049 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-26 19:40:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:45,602 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-26 19:40:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:40:45,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-26 19:40:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:45,605 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:40:45,605 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:40:45,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=464, Invalid=1698, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:40:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:40:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-10-26 19:40:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:40:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-26 19:40:45,630 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 50 [2020-10-26 19:40:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:45,631 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-26 19:40:45,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:40:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-26 19:40:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:40:45,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:45,637 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:45,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:40:45,638 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 12 times [2020-10-26 19:40:45,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:45,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023699795] [2020-10-26 19:40:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:45,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:47,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:50,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:40:50,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:54,734 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 22 [2020-10-26 19:40:55,091 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-10-26 19:40:55,674 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 33 [2020-10-26 19:40:56,453 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 51 [2020-10-26 19:40:57,069 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 48 [2020-10-26 19:40:58,739 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 409 DAG size of output: 84 [2020-10-26 19:41:00,078 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 303 DAG size of output: 91 [2020-10-26 19:41:01,682 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 442 DAG size of output: 95 [2020-10-26 19:41:04,379 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 446 DAG size of output: 100 [2020-10-26 19:41:06,634 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 237 DAG size of output: 130 [2020-10-26 19:41:08,562 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 208 DAG size of output: 125 [2020-10-26 19:41:13,879 WARN L193 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 305 DAG size of output: 164 [2020-10-26 19:41:15,402 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 217 DAG size of output: 141 [2020-10-26 19:41:18,465 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 190 DAG size of output: 111 [2020-10-26 19:41:19,241 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 102 [2020-10-26 19:41:20,049 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 101 [2020-10-26 19:41:20,703 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-10-26 19:41:21,252 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2020-10-26 19:41:21,552 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2020-10-26 19:41:21,781 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-10-26 19:41:23,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:23,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:23,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:23,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:41:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:23,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:41:23,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:41:23,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023699795] [2020-10-26 19:41:23,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:23,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:41:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355638754] [2020-10-26 19:41:23,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:41:23,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:41:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:41:23,134 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 31 states. [2020-10-26 19:41:29,733 WARN L193 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 407 DAG size of output: 247 [2020-10-26 19:41:36,122 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 409 DAG size of output: 248 [2020-10-26 19:41:38,682 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 273 DAG size of output: 122 [2020-10-26 19:41:40,479 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 249 DAG size of output: 92 [2020-10-26 19:42:20,363 WARN L193 SmtUtils]: Spent 39.27 s on a formula simplification. DAG size of input: 700 DAG size of output: 497