/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:52:12,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:52:12,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:52:12,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:52:12,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:52:12,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:52:12,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:52:12,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:52:12,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:52:12,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:52:12,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:52:12,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:52:12,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:52:12,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:52:12,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:52:12,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:52:12,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:52:12,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:52:12,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:52:12,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:52:12,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:52:12,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:52:12,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:52:12,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:52:12,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:52:12,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:52:12,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:52:12,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:52:12,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:52:12,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:52:12,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:52:12,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:52:12,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:52:12,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:52:12,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:52:12,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:52:12,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:52:12,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:52:12,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:52:12,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:52:12,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:52:12,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:52:12,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:52:12,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:52:12,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:52:12,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:52:12,245 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:52:12,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:52:12,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:52:12,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:52:12,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:52:12,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:52:12,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:52:12,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:52:12,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:52:12,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:52:12,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:52:12,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:52:12,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:52:12,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:52:12,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:52:12,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:52:12,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:52:12,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:52:12,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:52:12,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:52:12,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:52:12,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:52:12,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:52:12,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:52:12,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:52:12,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:52:12,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:52:12,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:52:12,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:52:12,677 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:52:12,677 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:52:12,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-29 09:52:12,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdfe57f9/0b4d3bf3e052479593433b92e13680b8/FLAG87b2ff9a7 [2020-10-29 09:52:13,317 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:52:13,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-29 09:52:13,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdfe57f9/0b4d3bf3e052479593433b92e13680b8/FLAG87b2ff9a7 [2020-10-29 09:52:13,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdfe57f9/0b4d3bf3e052479593433b92e13680b8 [2020-10-29 09:52:13,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:52:13,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:52:13,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:13,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:52:13,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:52:13,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544909a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13, skipping insertion in model container [2020-10-29 09:52:13,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:52:13,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:52:13,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:13,895 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:52:13,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:13,928 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:52:13,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13 WrapperNode [2020-10-29 09:52:13,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:13,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:52:13,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:52:13,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:52:13,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... [2020-10-29 09:52:13,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:52:13,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:52:13,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:52:13,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:52:13,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:52:14,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:52:14,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:52:14,048 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:52:14,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:52:14,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:52:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:52:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:52:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:52:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:52:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:52:14,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:52:14,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:52:14,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:52:14,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:52:14,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:52:14,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:52:14,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:52:14,344 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:52:14,344 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:52:14,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:14 BoogieIcfgContainer [2020-10-29 09:52:14,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:52:14,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:52:14,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:52:14,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:52:14,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:52:13" (1/3) ... [2020-10-29 09:52:14,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9e7ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:14, skipping insertion in model container [2020-10-29 09:52:14,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:13" (2/3) ... [2020-10-29 09:52:14,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9e7ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:14, skipping insertion in model container [2020-10-29 09:52:14,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:14" (3/3) ... [2020-10-29 09:52:14,357 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2020-10-29 09:52:14,373 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:52:14,379 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:52:14,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:52:14,430 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:52:14,430 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:52:14,430 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:52:14,431 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:52:14,431 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:52:14,431 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:52:14,431 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:52:14,432 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:52:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 09:52:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:52:14,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:14,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:14,457 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1288774906, now seen corresponding path program 1 times [2020-10-29 09:52:14,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55548932] [2020-10-29 09:52:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:15,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:15,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:15,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:52:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-29 09:52:15,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:15,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:52:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:52:15,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:52:15,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:15,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:15,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:15,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:15,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:52:15,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:15,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:15,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:15,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:15,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:15,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55548932] [2020-10-29 09:52:15,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:52:15,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:52:15,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745245780] [2020-10-29 09:52:15,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:52:15,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:15,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:52:15,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:52:15,615 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-29 09:52:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:15,981 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-10-29 09:52:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:15,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-29 09:52:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:15,992 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:52:15,992 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:52:15,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:52:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 09:52:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:52:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-29 09:52:16,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2020-10-29 09:52:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:16,081 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-29 09:52:16,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:52:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-29 09:52:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:52:16,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:16,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:16,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:52:16,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:16,084 INFO L82 PathProgramCache]: Analyzing trace with hash -472522044, now seen corresponding path program 1 times [2020-10-29 09:52:16,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:16,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995822414] [2020-10-29 09:52:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:16,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:52:16,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 09:52:16,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:16,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:52:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:52:16,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:16,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:16,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:16,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:16,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:16,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:16,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:16,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995822414] [2020-10-29 09:52:16,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:16,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:52:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883481856] [2020-10-29 09:52:16,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:52:16,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:16,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:52:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:52:16,321 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-10-29 09:52:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:16,449 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-29 09:52:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:52:16,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-29 09:52:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:16,451 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:52:16,451 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:52:16,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:52:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:52:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:52:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-29 09:52:16,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-29 09:52:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:16,459 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-29 09:52:16,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:52:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-29 09:52:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:52:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:16,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:16,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:52:16,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash -690252932, now seen corresponding path program 2 times [2020-10-29 09:52:16,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:16,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928026528] [2020-10-29 09:52:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:16,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:52:16,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:16,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-29 09:52:16,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:16,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:16,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:52:16,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:16,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:52:16,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:17,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:17,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:17,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:17,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928026528] [2020-10-29 09:52:17,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:17,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:52:17,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815999701] [2020-10-29 09:52:17,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:52:17,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:52:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:52:17,023 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 8 states. [2020-10-29 09:52:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:17,331 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-29 09:52:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:52:17,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-29 09:52:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:17,333 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:52:17,333 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:52:17,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:52:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:52:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-29 09:52:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:52:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-29 09:52:17,341 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2020-10-29 09:52:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:17,342 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-29 09:52:17,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:52:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-29 09:52:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:52:17,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:17,343 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:52:17,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1150024132, now seen corresponding path program 3 times [2020-10-29 09:52:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:17,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625867656] [2020-10-29 09:52:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:52:17,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-29 09:52:17,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:52:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:52:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:17,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:17,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:17,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:17,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:17,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625867656] [2020-10-29 09:52:17,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:17,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:52:17,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406409021] [2020-10-29 09:52:17,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:52:17,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:52:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:17,534 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-10-29 09:52:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:17,748 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-29 09:52:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:17,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-29 09:52:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:17,749 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:52:17,749 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:52:17,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:52:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:52:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:52:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:52:17,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-29 09:52:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:17,756 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:52:17,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:52:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:52:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:52:17,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:17,758 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:17,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:52:17,758 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1930929028, now seen corresponding path program 4 times [2020-10-29 09:52:17,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:17,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600405576] [2020-10-29 09:52:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:18,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:52:18,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:18,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:52:18,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:18,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:18,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:18,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600405576] [2020-10-29 09:52:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:52:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799626157] [2020-10-29 09:52:18,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:52:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:52:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:18,203 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-10-29 09:52:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:18,614 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-29 09:52:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:52:18,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-29 09:52:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:18,615 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:52:18,615 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:52:18,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:52:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:52:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-29 09:52:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:52:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:52:18,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-10-29 09:52:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:18,625 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:52:18,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:52:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:52:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:52:18,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:18,626 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:18,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:52:18,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:18,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1343770820, now seen corresponding path program 5 times [2020-10-29 09:52:18,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:18,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730820551] [2020-10-29 09:52:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:18,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:52:18,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-29 09:52:18,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:18,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:52:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:52:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:18,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:18,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:18,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:18,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:18,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:18,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:18,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730820551] [2020-10-29 09:52:18,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:18,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:52:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224822752] [2020-10-29 09:52:18,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:52:18,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:52:18,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:52:18,991 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-10-29 09:52:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:19,334 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-29 09:52:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:52:19,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:52:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:19,336 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:52:19,336 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:52:19,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:52:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:52:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:52:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:52:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 09:52:19,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-29 09:52:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:19,350 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 09:52:19,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:52:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 09:52:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:52:19,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:19,351 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:19,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:52:19,355 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -219748996, now seen corresponding path program 6 times [2020-10-29 09:52:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:19,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930051601] [2020-10-29 09:52:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:19,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:19,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:19,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:52:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:52:19,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:20,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:20,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930051601] [2020-10-29 09:52:20,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:20,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:52:20,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864691697] [2020-10-29 09:52:20,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:52:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:52:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:52:20,068 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 12 states. [2020-10-29 09:52:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:20,656 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-29 09:52:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:52:20,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-29 09:52:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:20,658 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:52:20,658 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:52:20,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:52:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:52:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-29 09:52:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:52:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-29 09:52:20,671 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2020-10-29 09:52:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:20,671 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-29 09:52:20,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:52:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-29 09:52:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:52:20,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:20,672 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:20,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:52:20,673 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1444223036, now seen corresponding path program 7 times [2020-10-29 09:52:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:20,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318769051] [2020-10-29 09:52:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:20,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:20,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:52:20,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-29 09:52:20,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:20,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:52:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:52:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:21,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:21,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:21,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:21,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:21,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:21,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318769051] [2020-10-29 09:52:21,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:21,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:52:21,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577398924] [2020-10-29 09:52:21,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:52:21,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:52:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:21,077 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 11 states. [2020-10-29 09:52:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:21,393 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-29 09:52:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:52:21,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:52:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:21,395 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:52:21,395 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:52:21,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:52:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:52:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:52:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:52:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-29 09:52:21,406 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-10-29 09:52:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:21,409 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-29 09:52:21,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:52:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-29 09:52:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:52:21,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:21,410 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:21,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:52:21,410 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash -748212612, now seen corresponding path program 8 times [2020-10-29 09:52:21,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:21,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629241056] [2020-10-29 09:52:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:21,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:22,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:22,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:52:22,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:52:22,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:22,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:22,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:22,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:22,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:22,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:22,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:22,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629241056] [2020-10-29 09:52:22,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:22,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:52:22,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620189830] [2020-10-29 09:52:22,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:52:22,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:22,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:52:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:52:22,295 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 14 states. [2020-10-29 09:52:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:23,104 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-29 09:52:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:52:23,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-29 09:52:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:23,107 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:52:23,107 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:52:23,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:52:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:52:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-29 09:52:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:52:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-29 09:52:23,119 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-29 09:52:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:23,119 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-29 09:52:23,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:52:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-29 09:52:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:52:23,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:23,120 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:23,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:52:23,121 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:23,121 INFO L82 PathProgramCache]: Analyzing trace with hash -646725948, now seen corresponding path program 9 times [2020-10-29 09:52:23,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557572052] [2020-10-29 09:52:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:23,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:23,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:23,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:52:23,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:23,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 09:52:23,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:23,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:23,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:52:23,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:23,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:52:23,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:23,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:23,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:23,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557572052] [2020-10-29 09:52:23,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:23,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:52:23,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532254865] [2020-10-29 09:52:23,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:52:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:52:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:52:23,532 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 13 states. [2020-10-29 09:52:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:23,991 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-29 09:52:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:52:23,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:52:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:23,995 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:52:23,995 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:52:23,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:52:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:52:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:52:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:52:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-29 09:52:24,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-29 09:52:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:24,011 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-29 09:52:24,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:52:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-29 09:52:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:52:24,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:24,014 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:24,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:52:24,014 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1243796932, now seen corresponding path program 10 times [2020-10-29 09:52:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:24,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900857185] [2020-10-29 09:52:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:24,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:24,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:24,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:52:24,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-29 09:52:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:24,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:52:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:52:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:24,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:24,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:24,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900857185] [2020-10-29 09:52:24,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:24,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:52:24,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078663300] [2020-10-29 09:52:24,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:52:24,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:52:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:52:24,583 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2020-10-29 09:52:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:25,216 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-29 09:52:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:52:25,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:52:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:25,217 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:52:25,217 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:52:25,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:52:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:52:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:52:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:52:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-29 09:52:25,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-29 09:52:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:25,227 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-29 09:52:25,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:52:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-29 09:52:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:52:25,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:25,230 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:25,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:52:25,230 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1265118404, now seen corresponding path program 11 times [2020-10-29 09:52:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:25,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674316378] [2020-10-29 09:52:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:25,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:25,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:52:25,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:25,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:52:25,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:25,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:25,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:25,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:25,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674316378] [2020-10-29 09:52:25,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:25,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:52:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700464665] [2020-10-29 09:52:25,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:52:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:52:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:52:25,805 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 17 states. [2020-10-29 09:52:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:26,513 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-29 09:52:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:52:26,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:52:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:26,514 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:52:26,514 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:52:26,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:52:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:52:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 09:52:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:52:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-29 09:52:26,526 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-29 09:52:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-29 09:52:26,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:52:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-29 09:52:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:52:26,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:26,532 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:26,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:52:26,532 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 280216516, now seen corresponding path program 12 times [2020-10-29 09:52:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727982008] [2020-10-29 09:52:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:26,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:26,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:52:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-29 09:52:27,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:27,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:52:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:52:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:27,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:27,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:27,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:27,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727982008] [2020-10-29 09:52:27,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:27,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:52:27,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627771109] [2020-10-29 09:52:27,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:52:27,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:52:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:52:27,313 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 19 states. [2020-10-29 09:52:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:28,094 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-29 09:52:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:52:28,095 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:52:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:28,095 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:52:28,096 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:52:28,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:52:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:52:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:52:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:52:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-29 09:52:28,112 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 28 [2020-10-29 09:52:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:28,112 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-29 09:52:28,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:52:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-29 09:52:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:52:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:28,115 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:28,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:52:28,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1317692732, now seen corresponding path program 13 times [2020-10-29 09:52:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:28,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293966384] [2020-10-29 09:52:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:52:28,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:28,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:52:28,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:28,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:28,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:28,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293966384] [2020-10-29 09:52:28,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:28,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:52:28,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280492960] [2020-10-29 09:52:28,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:52:28,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:52:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:52:28,974 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 21 states. [2020-10-29 09:52:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:29,854 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-29 09:52:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:52:29,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:52:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:29,855 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:52:29,855 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:52:29,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:52:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:52:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 09:52:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:52:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-29 09:52:29,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 30 [2020-10-29 09:52:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:29,863 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-29 09:52:29,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:52:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-29 09:52:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:52:29,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:29,864 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:29,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:52:29,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 689811908, now seen corresponding path program 14 times [2020-10-29 09:52:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:29,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620489367] [2020-10-29 09:52:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:52:30,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-29 09:52:30,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:52:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:52:30,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:30,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:30,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620489367] [2020-10-29 09:52:30,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:30,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:52:30,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208238823] [2020-10-29 09:52:30,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:52:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:30,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:52:30,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:52:30,926 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 23 states. [2020-10-29 09:52:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:31,991 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-29 09:52:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:52:31,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-29 09:52:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:31,993 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:52:31,993 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:52:31,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:52:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:52:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:52:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:52:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-29 09:52:32,000 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 32 [2020-10-29 09:52:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:32,000 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-29 09:52:32,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:52:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-29 09:52:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:52:32,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:32,001 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:32,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:52:32,002 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1461455044, now seen corresponding path program 15 times [2020-10-29 09:52:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:32,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514511789] [2020-10-29 09:52:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:32,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:52:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:33,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:33,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:33,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514511789] [2020-10-29 09:52:33,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:33,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:52:33,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384977725] [2020-10-29 09:52:33,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:52:33,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:52:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:52:33,231 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 25 states. [2020-10-29 09:52:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:34,459 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-29 09:52:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:52:34,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-29 09:52:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:34,461 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:52:34,461 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:52:34,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:52:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:52:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:52:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:52:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-29 09:52:34,469 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-10-29 09:52:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:34,469 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-29 09:52:34,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:52:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-29 09:52:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:52:34,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:34,470 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:34,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:52:34,471 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:34,471 INFO L82 PathProgramCache]: Analyzing trace with hash -18833468, now seen corresponding path program 16 times [2020-10-29 09:52:34,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:34,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708375670] [2020-10-29 09:52:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:34,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:52:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:35,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:52:35,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:35,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:35,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:35,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:35,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:35,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708375670] [2020-10-29 09:52:35,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:35,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:52:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003155875] [2020-10-29 09:52:35,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:52:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:52:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:52:35,829 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 27 states. [2020-10-29 09:52:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:37,185 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-29 09:52:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:52:37,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-29 09:52:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:37,187 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:52:37,187 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:52:37,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:52:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:52:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:52:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:52:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-29 09:52:37,194 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2020-10-29 09:52:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:37,194 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-29 09:52:37,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:52:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-29 09:52:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:52:37,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:37,195 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:37,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:52:37,196 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash -941918524, now seen corresponding path program 17 times [2020-10-29 09:52:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:37,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630925396] [2020-10-29 09:52:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:37,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 941 [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:38,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:38,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:52:38,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:38,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:52:38,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:38,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:38,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:38,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:38,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630925396] [2020-10-29 09:52:38,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:38,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:52:38,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989112941] [2020-10-29 09:52:38,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:52:38,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:52:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:52:38,754 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 29 states. [2020-10-29 09:52:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:40,210 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-29 09:52:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:52:40,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-29 09:52:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:40,214 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:52:40,214 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:52:40,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:52:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:52:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-29 09:52:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:52:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-29 09:52:40,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 38 [2020-10-29 09:52:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:40,221 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-29 09:52:40,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:52:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-29 09:52:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:52:40,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:40,222 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:40,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:52:40,223 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1031572932, now seen corresponding path program 18 times [2020-10-29 09:52:40,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:40,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111611911] [2020-10-29 09:52:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:52:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:41,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-29 09:52:41,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:41,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:52:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:52:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:41,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:41,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111611911] [2020-10-29 09:52:41,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:41,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:52:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450004784] [2020-10-29 09:52:41,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:52:41,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:52:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:52:41,984 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 31 states. [2020-10-29 09:52:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:43,716 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-29 09:52:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:52:43,716 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-29 09:52:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:43,718 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:52:43,718 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:52:43,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:52:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:52:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:52:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:52:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-29 09:52:43,725 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2020-10-29 09:52:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:43,725 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-29 09:52:43,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:52:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-29 09:52:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:52:43,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:43,726 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:43,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:52:43,726 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -818682684, now seen corresponding path program 19 times [2020-10-29 09:52:43,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:43,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364024301] [2020-10-29 09:52:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:44,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:52:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:52:44,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:45,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:45,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:45,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364024301] [2020-10-29 09:52:45,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:45,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:52:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159058465] [2020-10-29 09:52:45,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:52:45,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:52:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:52:45,669 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 33 states. [2020-10-29 09:52:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:47,574 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-29 09:52:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:52:47,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-29 09:52:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:47,575 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:52:47,575 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:52:47,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:52:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:52:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-29 09:52:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:52:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-29 09:52:47,584 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2020-10-29 09:52:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:47,585 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-29 09:52:47,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:52:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-29 09:52:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:52:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:47,585 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:52:47,586 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash -797869116, now seen corresponding path program 20 times [2020-10-29 09:52:47,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:47,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295363515] [2020-10-29 09:52:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:47,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:48,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:52:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:52:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:49,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:49,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:49,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:49,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:49,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295363515] [2020-10-29 09:52:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:49,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:52:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645773892] [2020-10-29 09:52:49,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:52:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:52:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:52:49,699 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 35 states. [2020-10-29 09:52:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:51,779 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-29 09:52:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:52:51,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-29 09:52:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:51,781 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:52:51,781 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:52:51,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:52:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:52:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-29 09:52:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:52:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-29 09:52:51,795 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 44 [2020-10-29 09:52:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:51,795 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-29 09:52:51,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:52:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-29 09:52:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:52:51,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:51,802 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:51,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:52:51,802 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2024100548, now seen corresponding path program 21 times [2020-10-29 09:52:51,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:51,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830904684] [2020-10-29 09:52:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:51,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:53,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:53,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:52:53,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:52:53,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:54,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:54,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:54,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830904684] [2020-10-29 09:52:54,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:54,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:52:54,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128185499] [2020-10-29 09:52:54,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:52:54,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:52:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:52:54,102 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 37 states. [2020-10-29 09:52:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:56,378 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-29 09:52:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:52:56,382 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-29 09:52:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:56,383 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:52:56,383 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:52:56,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:52:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:52:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:52:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:52:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-29 09:52:56,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2020-10-29 09:52:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:56,389 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-29 09:52:56,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:52:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-29 09:52:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:52:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:56,390 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:56,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:52:56,390 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash -482383420, now seen corresponding path program 22 times [2020-10-29 09:52:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:56,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716687059] [2020-10-29 09:52:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:56,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:57,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:52:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:58,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716687059] [2020-10-29 09:52:58,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:58,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:52:58,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345838896] [2020-10-29 09:52:58,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:52:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:52:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:52:58,719 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 39 states. [2020-10-29 09:53:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:01,270 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-29 09:53:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:53:01,272 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-29 09:53:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:01,273 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:53:01,273 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:53:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:53:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:53:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 09:53:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:53:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-29 09:53:01,280 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 48 [2020-10-29 09:53:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:01,280 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-29 09:53:01,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:53:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-29 09:53:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:53:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:01,281 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:01,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:53:01,281 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 263176388, now seen corresponding path program 23 times [2020-10-29 09:53:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:01,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665796947] [2020-10-29 09:53:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:02,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:53:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:53:02,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:03,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:03,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:03,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665796947] [2020-10-29 09:53:03,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:03,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:53:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296652418] [2020-10-29 09:53:03,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:53:03,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:53:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:53:03,910 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 41 states. [2020-10-29 09:53:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:06,477 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-29 09:53:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:53:06,477 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-29 09:53:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:06,478 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:53:06,479 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:53:06,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:53:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:53:06,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:53:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:53:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-29 09:53:06,485 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 50 [2020-10-29 09:53:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:06,485 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-29 09:53:06,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:53:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-29 09:53:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:53:06,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:06,486 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:06,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:53:06,487 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash -513386556, now seen corresponding path program 24 times [2020-10-29 09:53:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:06,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990326468] [2020-10-29 09:53:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:06,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:07,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:53:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:53:07,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:09,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990326468] [2020-10-29 09:53:09,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:09,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:53:09,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126684265] [2020-10-29 09:53:09,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:53:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:53:09,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:53:09,058 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 43 states. [2020-10-29 09:53:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:12,027 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-29 09:53:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:53:12,027 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-29 09:53:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:12,028 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:53:12,029 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:53:12,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:53:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:53:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-29 09:53:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:53:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-29 09:53:12,036 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 52 [2020-10-29 09:53:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:12,036 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-29 09:53:12,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:53:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-29 09:53:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:53:12,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:12,037 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:12,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:53:12,037 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash 533933764, now seen corresponding path program 25 times [2020-10-29 09:53:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:12,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135189836] [2020-10-29 09:53:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:12,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1481 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:53:13,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:13,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:53:13,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:14,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:14,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135189836] [2020-10-29 09:53:14,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:14,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:53:14,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803321275] [2020-10-29 09:53:14,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:53:14,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:53:14,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:53:14,917 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 45 states. [2020-10-29 09:53:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:18,033 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-29 09:53:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:53:18,034 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-29 09:53:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:18,035 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:53:18,035 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:53:18,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:53:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:53:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-29 09:53:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:53:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-29 09:53:18,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2020-10-29 09:53:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:18,041 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-29 09:53:18,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:53:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-29 09:53:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:53:18,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:18,042 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:18,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:53:18,042 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1986414020, now seen corresponding path program 26 times [2020-10-29 09:53:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:18,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281006265] [2020-10-29 09:53:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:18,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:53:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:21,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:21,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:21,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:21,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:21,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:21,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:21,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281006265] [2020-10-29 09:53:21,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:21,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:53:21,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078582640] [2020-10-29 09:53:21,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:53:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:53:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:53:21,159 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 47 states. [2020-10-29 09:53:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:24,429 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-29 09:53:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:53:24,430 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-29 09:53:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:24,431 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:53:24,431 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:53:24,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:53:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:53:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:53:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:53:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-29 09:53:24,437 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-29 09:53:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:24,437 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-29 09:53:24,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:53:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-29 09:53:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:53:24,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:24,438 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:24,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:53:24,438 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1955568836, now seen corresponding path program 27 times [2020-10-29 09:53:24,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:24,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792610187] [2020-10-29 09:53:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1833 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:53:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:27,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:27,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:27,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:27,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792610187] [2020-10-29 09:53:27,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:27,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:53:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707060780] [2020-10-29 09:53:27,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:53:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:53:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:53:27,890 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 49 states. [2020-10-29 09:53:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:31,430 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-29 09:53:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:53:31,431 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-29 09:53:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:31,432 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:53:31,432 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:53:31,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:53:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:53:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-29 09:53:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:53:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-29 09:53:31,437 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 58 [2020-10-29 09:53:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:31,438 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-29 09:53:31,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:53:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-29 09:53:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:53:31,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:31,438 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:31,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:53:31,439 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1916849212, now seen corresponding path program 28 times [2020-10-29 09:53:31,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:31,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719810561] [2020-10-29 09:53:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:33,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2009 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:53:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:35,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:35,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:35,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719810561] [2020-10-29 09:53:35,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:35,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:53:35,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530853848] [2020-10-29 09:53:35,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:53:35,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:35,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:53:35,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:53:35,232 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 51 states. [2020-10-29 09:53:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:39,029 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-29 09:53:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:53:39,030 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-29 09:53:39,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:39,031 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:53:39,031 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 09:53:39,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:53:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 09:53:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-29 09:53:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:53:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-29 09:53:39,042 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 60 [2020-10-29 09:53:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:39,042 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-29 09:53:39,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:53:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-29 09:53:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:53:39,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:39,043 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:39,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:53:39,043 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:39,044 INFO L82 PathProgramCache]: Analyzing trace with hash 426052292, now seen corresponding path program 29 times [2020-10-29 09:53:39,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:39,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891882028] [2020-10-29 09:53:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2106 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:53:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:43,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:43,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:43,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:43,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:43,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:43,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891882028] [2020-10-29 09:53:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:43,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:53:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402553245] [2020-10-29 09:53:43,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:53:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:53:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:53:43,051 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 53 states. [2020-10-29 09:53:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:47,274 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-29 09:53:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 09:53:47,274 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-29 09:53:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:47,276 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:53:47,276 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:53:47,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-29 09:53:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:53:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-29 09:53:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:53:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-29 09:53:47,290 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 62 [2020-10-29 09:53:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:47,290 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-29 09:53:47,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 09:53:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-29 09:53:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:53:47,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:47,291 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:47,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:53:47,291 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1391534532, now seen corresponding path program 30 times [2020-10-29 09:53:47,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142479916] [2020-10-29 09:53:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:49,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:49,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:53:49,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2421 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:53:49,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:51,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:51,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:51,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:51,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:51,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142479916] [2020-10-29 09:53:51,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:51,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 09:53:51,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303212141] [2020-10-29 09:53:51,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 09:53:51,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 09:53:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:53:51,783 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 55 states. [2020-10-29 09:53:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:56,236 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-29 09:53:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-29 09:53:56,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-29 09:53:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:56,238 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:53:56,238 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:53:56,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-29 09:53:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:53:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-29 09:53:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:53:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-29 09:53:56,249 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 64 [2020-10-29 09:53:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:56,249 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-29 09:53:56,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 09:53:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-29 09:53:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:53:56,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:56,250 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:56,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:53:56,250 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1507031236, now seen corresponding path program 31 times [2020-10-29 09:53:56,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:56,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657150173] [2020-10-29 09:53:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:59,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:53:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:01,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:01,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:01,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:01,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:01,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657150173] [2020-10-29 09:54:01,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-29 09:54:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906776409] [2020-10-29 09:54:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-29 09:54:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-29 09:54:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:54:01,320 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 57 states. [2020-10-29 09:54:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:06,106 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-29 09:54:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-29 09:54:06,107 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-29 09:54:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:06,107 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:54:06,108 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:54:06,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-29 09:54:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:54:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-29 09:54:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:54:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-29 09:54:06,118 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 66 [2020-10-29 09:54:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:06,118 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-29 09:54:06,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-29 09:54:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-29 09:54:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:54:06,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:06,121 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:06,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:54:06,121 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash 830214084, now seen corresponding path program 32 times [2020-10-29 09:54:06,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:06,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314994022] [2020-10-29 09:54:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2794 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:54:08,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:11,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:11,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314994022] [2020-10-29 09:54:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-29 09:54:11,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461319722] [2020-10-29 09:54:11,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-29 09:54:11,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-29 09:54:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:54:11,344 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 59 states. [2020-10-29 09:54:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:16,370 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-29 09:54:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-29 09:54:16,371 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-29 09:54:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:16,372 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:54:16,372 INFO L226 Difference]: Without dead ends: 80 [2020-10-29 09:54:16,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-29 09:54:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-29 09:54:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-29 09:54:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:54:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-29 09:54:16,378 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2020-10-29 09:54:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:16,378 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-29 09:54:16,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-29 09:54:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-29 09:54:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:54:16,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:16,379 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:16,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:54:16,380 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1051007292, now seen corresponding path program 33 times [2020-10-29 09:54:16,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:16,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420136556] [2020-10-29 09:54:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2878 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-29 09:54:19,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:54:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:21,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:21,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:21,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:21,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420136556] [2020-10-29 09:54:21,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:21,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-29 09:54:21,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102070211] [2020-10-29 09:54:21,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-29 09:54:21,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:21,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-29 09:54:21,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:54:21,760 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 61 states. [2020-10-29 09:54:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:27,031 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-29 09:54:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-29 09:54:27,032 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-10-29 09:54:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:27,033 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:54:27,033 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:54:27,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-29 09:54:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:54:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-29 09:54:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:54:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-29 09:54:27,038 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 70 [2020-10-29 09:54:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:27,039 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-29 09:54:27,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-29 09:54:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-29 09:54:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:54:27,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:27,040 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:27,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:54:27,040 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash -723518012, now seen corresponding path program 34 times [2020-10-29 09:54:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:27,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261433786] [2020-10-29 09:54:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:27,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:30,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:30,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:54:30,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:30,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3100 [2020-10-29 09:54:30,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:30,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-29 09:54:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:54:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:32,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:32,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:32,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:32,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261433786] [2020-10-29 09:54:32,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:32,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-29 09:54:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747628325] [2020-10-29 09:54:32,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-29 09:54:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-29 09:54:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:54:32,885 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-29 09:54:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:38,526 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-29 09:54:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-29 09:54:38,527 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 72 [2020-10-29 09:54:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:38,528 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:54:38,528 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:54:38,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2020-10-29 09:54:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:54:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-29 09:54:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:54:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-29 09:54:38,533 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 72 [2020-10-29 09:54:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:38,534 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-29 09:54:38,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-29 09:54:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-29 09:54:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:54:38,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:38,535 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:38,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:54:38,535 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:38,535 INFO L82 PathProgramCache]: Analyzing trace with hash 461067460, now seen corresponding path program 35 times [2020-10-29 09:54:38,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:38,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272192037] [2020-10-29 09:54:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:42,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:42,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:54:42,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3474 [2020-10-29 09:54:42,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:42,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-29 09:54:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:54:42,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:44,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:44,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:44,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:44,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272192037] [2020-10-29 09:54:44,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:44,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-29 09:54:44,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107575423] [2020-10-29 09:54:44,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-29 09:54:44,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:44,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-29 09:54:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:54:44,957 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 65 states. [2020-10-29 09:54:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:51,105 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-29 09:54:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-29 09:54:51,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 74 [2020-10-29 09:54:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:51,107 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:54:51,107 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:54:51,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2020-10-29 09:54:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:54:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-29 09:54:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:54:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-29 09:54:51,114 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 74 [2020-10-29 09:54:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:51,114 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-29 09:54:51,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-29 09:54:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-29 09:54:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:54:51,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:51,115 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:51,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:54:51,115 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 681372612, now seen corresponding path program 36 times [2020-10-29 09:54:51,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:51,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160293656] [2020-10-29 09:54:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:51,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:54,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:54,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:54:54,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:58,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:58,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:58,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160293656] [2020-10-29 09:54:58,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:58,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-29 09:54:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144513091] [2020-10-29 09:54:58,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-29 09:54:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-29 09:54:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:54:58,033 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 67 states. [2020-10-29 09:55:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:04,531 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-29 09:55:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-29 09:55:04,532 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 76 [2020-10-29 09:55:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:04,533 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:55:04,533 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:55:04,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2020-10-29 09:55:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:55:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-29 09:55:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:55:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-29 09:55:04,539 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 76 [2020-10-29 09:55:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:04,539 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-29 09:55:04,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-29 09:55:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-29 09:55:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:55:04,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:04,540 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:04,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:55:04,540 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1941226180, now seen corresponding path program 37 times [2020-10-29 09:55:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:04,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854768795] [2020-10-29 09:55:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:04,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4071 [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-29 09:55:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:55:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:11,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:11,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854768795] [2020-10-29 09:55:11,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:11,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-29 09:55:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422930988] [2020-10-29 09:55:11,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-29 09:55:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:11,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-29 09:55:11,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:55:11,964 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 69 states. [2020-10-29 09:55:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:18,778 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-29 09:55:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-29 09:55:18,780 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 78 [2020-10-29 09:55:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:18,781 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:55:18,781 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:55:18,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2020-10-29 09:55:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:55:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-29 09:55:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:55:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-29 09:55:18,786 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 78 [2020-10-29 09:55:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:18,787 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-29 09:55:18,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-29 09:55:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-29 09:55:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 09:55:18,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:18,788 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:18,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:55:18,788 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1479727556, now seen corresponding path program 38 times [2020-10-29 09:55:18,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:18,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593388091] [2020-10-29 09:55:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:18,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4428 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:23,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 09:55:23,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:26,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:26,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593388091] [2020-10-29 09:55:26,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:26,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-29 09:55:26,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075645549] [2020-10-29 09:55:26,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-29 09:55:26,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-29 09:55:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:55:26,825 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 71 states. [2020-10-29 09:55:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:33,871 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-29 09:55:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-29 09:55:33,872 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 80 [2020-10-29 09:55:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:33,873 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:55:33,873 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:55:33,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2020-10-29 09:55:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:55:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-29 09:55:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:55:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-29 09:55:33,879 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 80 [2020-10-29 09:55:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:33,879 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-29 09:55:33,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-29 09:55:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-29 09:55:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:55:33,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:33,880 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:33,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:55:33,880 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash 361181380, now seen corresponding path program 39 times [2020-10-29 09:55:33,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:33,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228588601] [2020-10-29 09:55:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4766 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 09:55:38,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:42,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228588601] [2020-10-29 09:55:42,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:42,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-29 09:55:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557945217] [2020-10-29 09:55:42,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-29 09:55:42,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-29 09:55:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:55:42,462 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 73 states. [2020-10-29 09:55:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:50,061 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-29 09:55:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-29 09:55:50,062 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 82 [2020-10-29 09:55:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:50,065 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:55:50,065 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:55:50,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2020-10-29 09:55:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:55:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-29 09:55:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:55:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-29 09:55:50,071 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2020-10-29 09:55:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:50,072 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-29 09:55:50,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-29 09:55:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-29 09:55:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:55:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:50,073 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:50,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:55:50,073 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -819869756, now seen corresponding path program 40 times [2020-10-29 09:55:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:50,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918550649] [2020-10-29 09:55:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:50,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:55,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:55,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:55:55,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:55:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:59,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:59,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918550649] [2020-10-29 09:55:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:59,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-29 09:55:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132195442] [2020-10-29 09:55:59,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-29 09:55:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-29 09:55:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:55:59,147 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 75 states. [2020-10-29 09:56:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:06,995 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-29 09:56:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-29 09:56:06,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 84 [2020-10-29 09:56:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:06,997 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:56:06,997 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:56:06,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2020-10-29 09:56:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:56:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-29 09:56:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:56:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-29 09:56:07,002 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 84 [2020-10-29 09:56:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:07,003 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-29 09:56:07,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-29 09:56:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-29 09:56:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:56:07,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:07,004 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:07,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:56:07,004 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1938645308, now seen corresponding path program 41 times [2020-10-29 09:56:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:07,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453987202] [2020-10-29 09:56:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking...