/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/s4lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:42:02,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:42:02,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:42:02,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:42:02,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:42:02,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:42:02,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:42:02,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:42:02,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:42:02,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:42:02,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:42:02,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:42:02,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:42:02,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:42:02,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:42:02,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:42:02,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:42:02,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:42:02,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:42:02,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:42:02,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:42:02,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:42:02,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:42:02,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:42:02,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:42:02,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:42:02,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:42:02,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:42:02,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:42:02,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:42:02,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:42:02,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:42:02,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:42:02,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:42:02,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:42:02,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:42:02,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:42:02,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:42:02,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:42:02,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:42:02,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:42:02,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:42:02,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:42:02,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:42:02,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:42:02,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:42:02,234 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:42:02,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:42:02,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:42:02,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:42:02,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:42:02,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:42:02,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:42:02,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:42:02,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:42:02,238 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:42:02,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:42:02,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:42:02,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:42:02,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:42:02,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:42:02,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:42:02,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:42:02,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:42:02,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:42:02,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:42:02,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:42:02,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:42:02,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:42:02,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:42:02,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:42:02,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:42:02,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:42:02,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:42:02,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:42:02,698 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:42:02,699 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:42:02,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-26 19:42:02,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df9db0ee0/ec1ab15757f3459f9cba5f036385b47a/FLAGac991f4a2 [2020-10-26 19:42:03,445 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:42:03,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-26 19:42:03,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df9db0ee0/ec1ab15757f3459f9cba5f036385b47a/FLAGac991f4a2 [2020-10-26 19:42:03,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df9db0ee0/ec1ab15757f3459f9cba5f036385b47a [2020-10-26 19:42:03,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:42:03,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:42:03,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:42:03,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:42:03,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:42:03,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:42:03" (1/1) ... [2020-10-26 19:42:03,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a35012e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:03, skipping insertion in model container [2020-10-26 19:42:03,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:42:03" (1/1) ... [2020-10-26 19:42:03,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:42:03,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:42:04,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:42:04,093 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:42:04,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:42:04,140 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:42:04,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04 WrapperNode [2020-10-26 19:42:04,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:42:04,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:42:04,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:42:04,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:42:04,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... [2020-10-26 19:42:04,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:42:04,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:42:04,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:42:04,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:42:04,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:42:04,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:42:04,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:42:04,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:42:04,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:42:04,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:42:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:42:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:42:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:42:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:42:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:42:04,319 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:42:04,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:42:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:42:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:42:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:42:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:42:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:42:04,891 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:42:04,891 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:42:04,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:42:04 BoogieIcfgContainer [2020-10-26 19:42:04,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:42:04,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:42:04,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:42:04,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:42:04,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:42:03" (1/3) ... [2020-10-26 19:42:04,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7678f386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:42:04, skipping insertion in model container [2020-10-26 19:42:04,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:04" (2/3) ... [2020-10-26 19:42:04,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7678f386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:42:04, skipping insertion in model container [2020-10-26 19:42:04,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:42:04" (3/3) ... [2020-10-26 19:42:04,905 INFO L111 eAbstractionObserver]: Analyzing ICFG s4lif.c [2020-10-26 19:42:04,921 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:42:04,928 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:42:04,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:42:04,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:42:04,980 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:42:04,980 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:42:04,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:42:04,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:42:04,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:42:04,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:42:04,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:42:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:42:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:42:05,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:05,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:05,022 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-26 19:42:05,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:05,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951684181] [2020-10-26 19:42:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:06,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:42:06,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:42:06,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-26 19:42:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:42:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:42:06,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:42:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:42:06,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:06,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:06,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:06,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:42:06,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:06,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:06,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:06,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:06,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:06,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:06,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:06,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:06,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:06,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:42:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:42:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:06,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951684181] [2020-10-26 19:42:06,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:42:06,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:42:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920808260] [2020-10-26 19:42:06,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:42:06,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:42:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:42:06,494 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-26 19:42:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:06,780 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-26 19:42:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:42:06,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:42:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:06,791 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:42:06,792 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:42:06,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:42:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:42:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-26 19:42:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:42:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:42:06,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-26 19:42:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:06,844 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:42:06,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:42:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:42:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:42:06,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:06,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:06,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:42:06,847 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-26 19:42:06,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:06,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859565809] [2020-10-26 19:42:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:06,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:07,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:10,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:10,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:42:10,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:42:10,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3625 [2020-10-26 19:42:10,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:42:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:42:10,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:10,847 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-26 19:42:11,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:11,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:11,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:11,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:42:11,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:11,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:11,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:11,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:11,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:11,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:11,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:11,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:11,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:11,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859565809] [2020-10-26 19:42:11,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:11,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:42:11,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737379491] [2020-10-26 19:42:11,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:42:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:42:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:42:11,408 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-26 19:42:11,714 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2020-10-26 19:42:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:13,085 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-26 19:42:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:42:13,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-26 19:42:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:13,088 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:42:13,088 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:42:13,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:42:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:42:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-26 19:42:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:42:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:42:13,100 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-26 19:42:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:13,100 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:42:13,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:42:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:42:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:42:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:13,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:13,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:42:13,102 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-26 19:42:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:13,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774573110] [2020-10-26 19:42:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:42:14,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:42:14,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-26 19:42:14,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:42:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:42:14,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:14,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:14,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:14,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:14,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:14,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:14,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:14,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:14,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:14,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774573110] [2020-10-26 19:42:14,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:14,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:42:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243835555] [2020-10-26 19:42:14,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:42:14,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:42:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:42:14,673 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-26 19:42:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:15,273 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-26 19:42:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:42:15,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:42:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:15,276 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:42:15,276 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:42:15,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:42:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:42:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-10-26 19:42:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:42:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-26 19:42:15,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2020-10-26 19:42:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:15,305 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-26 19:42:15,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:42:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-26 19:42:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:42:15,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:15,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:15,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:42:15,309 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-26 19:42:15,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:15,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401505687] [2020-10-26 19:42:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:15,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:42:16,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:16,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-26 19:42:16,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:42:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:42:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:16,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:42:16,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:16,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:16,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:16,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:16,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:42:16,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401505687] [2020-10-26 19:42:16,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:16,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:42:16,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913797668] [2020-10-26 19:42:16,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:42:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:42:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:42:16,304 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-26 19:42:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:16,639 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-26 19:42:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:42:16,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:42:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:16,641 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:42:16,641 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:42:16,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:42:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:42:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-26 19:42:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:42:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-26 19:42:16,664 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-26 19:42:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:16,664 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-26 19:42:16,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:42:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-26 19:42:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:42:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:16,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:16,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:42:16,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-26 19:42:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:16,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251032366] [2020-10-26 19:42:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:18,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:20,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:20,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:42:20,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:42:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4224 [2020-10-26 19:42:20,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:42:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:42:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:21,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:21,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:21,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:21,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:21,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:21,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:42:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:21,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:21,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:21,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:21,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:21,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:21,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:21,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:21,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:21,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:42:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:42:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251032366] [2020-10-26 19:42:21,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:21,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:42:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641889030] [2020-10-26 19:42:21,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:42:21,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:21,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:42:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:42:21,277 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 13 states. [2020-10-26 19:42:22,177 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-26 19:42:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:22,434 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-26 19:42:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:42:22,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:42:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:22,436 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:42:22,436 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:42:22,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:42:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:42:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2020-10-26 19:42:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:42:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:42:22,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-26 19:42:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:22,447 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:42:22,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:42:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:42:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:42:22,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:22,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:22,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:42:22,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-26 19:42:22,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:22,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103068736] [2020-10-26 19:42:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:22,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:27,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:27,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:42:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:42:27,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:42:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:42:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,144 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-26 19:42:28,300 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-26 19:42:28,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:28,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:42:28,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:28,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:28,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:42:28,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103068736] [2020-10-26 19:42:28,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:28,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:42:28,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835432006] [2020-10-26 19:42:28,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:42:28,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:42:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:42:28,912 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-26 19:42:29,917 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:42:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:30,393 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-26 19:42:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:42:30,395 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-26 19:42:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:30,396 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:42:30,397 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:42:30,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:42:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:42:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-26 19:42:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:42:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:42:30,409 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-26 19:42:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:30,410 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:42:30,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:42:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:42:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:42:30,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:30,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:30,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:42:30,411 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-26 19:42:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:30,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190210437] [2020-10-26 19:42:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:30,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:30,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:32,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:33,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:33,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:42:33,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3277 [2020-10-26 19:42:33,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:42:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:42:33,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:33,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:33,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:33,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:33,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:33,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:33,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:33,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:42:33,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:33,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:42:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190210437] [2020-10-26 19:42:33,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:33,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:42:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729286461] [2020-10-26 19:42:33,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:42:33,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:42:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:42:33,891 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-10-26 19:42:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:34,178 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-26 19:42:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:42:34,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-26 19:42:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:34,180 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:42:34,180 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:42:34,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:42:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:42:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-26 19:42:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:42:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-26 19:42:34,200 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2020-10-26 19:42:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:34,202 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-26 19:42:34,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:42:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-26 19:42:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:42:34,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:34,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:34,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:42:34,207 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-26 19:42:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:34,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106677362] [2020-10-26 19:42:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:37,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:37,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:42:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2962 [2020-10-26 19:42:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:42:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:42:37,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:37,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:37,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:37,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:37,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:37,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:37,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:37,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:37,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:37,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:37,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:37,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:42:37,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106677362] [2020-10-26 19:42:37,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:37,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:42:37,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33903927] [2020-10-26 19:42:37,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:42:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:42:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:42:37,348 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2020-10-26 19:42:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:37,474 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-26 19:42:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:42:37,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-26 19:42:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:37,476 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:42:37,477 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:42:37,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:42:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:42:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-26 19:42:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:42:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:42:37,498 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2020-10-26 19:42:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:37,498 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:42:37,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:42:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:42:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:42:37,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:37,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:37,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:42:37,502 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-26 19:42:37,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:37,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230431811] [2020-10-26 19:42:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:42:38,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:38,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:38,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:42:38,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230431811] [2020-10-26 19:42:38,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:38,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:42:38,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382052267] [2020-10-26 19:42:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:42:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:42:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:42:38,537 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 10 states. [2020-10-26 19:42:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:38,863 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-26 19:42:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:42:38,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-26 19:42:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:38,865 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:42:38,865 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:42:38,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:42:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:42:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-26 19:42:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:42:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:42:38,877 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2020-10-26 19:42:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:38,877 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:42:38,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:42:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:42:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:42:38,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:38,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:38,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:42:38,879 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-26 19:42:38,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:38,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566486411] [2020-10-26 19:42:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:39,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:41,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:43,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:42:43,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 19:42:43,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:42:43,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:42:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:42:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:42:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:44,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:42:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:44,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:42:44,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566486411] [2020-10-26 19:42:44,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:42:44,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275255083] [2020-10-26 19:42:44,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:42:44,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:42:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:42:44,593 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 21 states. [2020-10-26 19:42:45,155 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-26 19:42:45,733 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-26 19:42:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:46,492 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-26 19:42:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:42:46,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-26 19:42:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:46,494 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:42:46,494 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:42:46,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:42:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:42:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-10-26 19:42:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:42:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-26 19:42:46,514 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2020-10-26 19:42:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:46,516 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-26 19:42:46,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:42:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-26 19:42:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:42:46,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:46,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:46,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:42:46,521 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash -828286733, now seen corresponding path program 4 times [2020-10-26 19:42:46,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:46,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149512742] [2020-10-26 19:42:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:46,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:48,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:51,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:42:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:42:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:51,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:51,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:51,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:42:51,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149512742] [2020-10-26 19:42:51,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:51,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:42:51,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096702842] [2020-10-26 19:42:51,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:42:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:42:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:42:51,942 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 16 states. [2020-10-26 19:42:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:52,645 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-26 19:42:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:42:52,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 19:42:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:52,647 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:42:52,647 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:42:52,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:42:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:42:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-26 19:42:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:42:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-26 19:42:52,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2020-10-26 19:42:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:52,658 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-26 19:42:52,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:42:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-26 19:42:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:42:52,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:52,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:52,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:42:52,660 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-26 19:42:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:52,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995844947] [2020-10-26 19:42:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:52,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:57,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:57,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:42:57,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:42:57,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:42:57,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:42:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:42:57,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:57,994 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:42:58,540 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-26 19:42:58,694 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-26 19:42:58,958 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-26 19:43:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:00,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:00,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:00,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:00,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:00,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:00,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:00,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:43:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995844947] [2020-10-26 19:43:00,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:00,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:43:00,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443886355] [2020-10-26 19:43:00,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:43:00,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:00,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:43:00,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:43:00,183 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 26 states. [2020-10-26 19:43:00,732 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2020-10-26 19:43:00,907 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-26 19:43:01,385 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-26 19:43:02,171 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:43:02,662 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:43:02,974 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-26 19:43:03,174 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-26 19:43:03,557 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2020-10-26 19:43:03,837 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-26 19:43:04,228 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-26 19:43:04,552 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-26 19:43:04,753 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-26 19:43:05,097 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-10-26 19:43:05,298 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-26 19:43:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:05,575 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-26 19:43:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:43:05,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-26 19:43:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:05,577 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:43:05,578 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:43:05,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:43:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:43:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-26 19:43:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:43:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:43:05,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 45 [2020-10-26 19:43:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:05,599 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:43:05,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:43:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:43:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:43:05,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:05,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:05,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:43:05,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:05,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 5 times [2020-10-26 19:43:05,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:05,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547481890] [2020-10-26 19:43:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:05,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:05,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:06,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:08,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:43:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:11,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:11,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:11,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:11,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:11,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:11,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:11,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:43:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547481890] [2020-10-26 19:43:11,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:11,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:43:11,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018918470] [2020-10-26 19:43:11,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:43:11,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:43:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:43:11,051 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-26 19:43:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:11,966 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 19:43:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:43:11,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-26 19:43:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:11,970 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:43:11,970 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:43:11,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:43:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:43:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-26 19:43:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:43:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-26 19:43:11,985 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 45 [2020-10-26 19:43:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:11,986 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-26 19:43:11,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:43:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-26 19:43:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:43:11,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:11,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:11,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:43:11,988 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 157796207, now seen corresponding path program 6 times [2020-10-26 19:43:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:11,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165823826] [2020-10-26 19:43:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:12,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:12,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:15,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:17,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:17,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:43:17,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:43:17,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:43:17,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:43:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:43:17,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:43:17,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:17,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:17,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:17,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:17,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:17,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:17,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:17,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:17,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:43:17,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165823826] [2020-10-26 19:43:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:43:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689519964] [2020-10-26 19:43:17,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:43:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:43:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:43:17,337 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 16 states. [2020-10-26 19:43:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:18,128 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-26 19:43:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:43:18,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-26 19:43:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:18,130 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:43:18,130 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:43:18,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:43:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:43:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-26 19:43:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:43:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-26 19:43:18,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 47 [2020-10-26 19:43:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:18,153 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-26 19:43:18,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:43:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-26 19:43:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:43:18,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:18,154 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:18,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:43:18,154 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1069730410, now seen corresponding path program 7 times [2020-10-26 19:43:18,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:18,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964707171] [2020-10-26 19:43:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:18,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:18,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:19,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:21,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:23,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:23,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:43:23,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:43:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:23,602 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 19:43:24,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:24,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:24,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:24,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:24,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:24,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:24,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:43:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964707171] [2020-10-26 19:43:24,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:24,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:43:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734889659] [2020-10-26 19:43:24,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:43:24,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:43:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:43:24,052 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 21 states. [2020-10-26 19:43:25,130 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-26 19:43:25,399 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-26 19:43:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:25,971 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-26 19:43:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:43:25,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-26 19:43:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:25,973 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:43:25,973 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:43:25,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:43:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:43:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2020-10-26 19:43:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:43:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:43:25,985 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2020-10-26 19:43:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:25,985 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:43:25,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:43:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:43:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:43:25,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:25,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:25,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:43:25,986 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1586699352, now seen corresponding path program 8 times [2020-10-26 19:43:25,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:25,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571921211] [2020-10-26 19:43:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:27,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:29,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:29,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:43:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:43:31,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,464 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:43:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:31,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:31,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:31,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:31,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:31,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:43:31,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571921211] [2020-10-26 19:43:31,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:31,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:43:31,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497697279] [2020-10-26 19:43:31,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:43:31,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:31,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:43:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:43:31,914 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 20 states. [2020-10-26 19:43:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:34,208 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-26 19:43:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:43:34,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:43:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:34,210 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:43:34,211 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:43:34,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=389, Invalid=1591, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:43:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:43:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2020-10-26 19:43:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:43:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-26 19:43:34,228 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 50 [2020-10-26 19:43:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:34,229 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-26 19:43:34,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:43:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-26 19:43:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:34,230 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:43:34,230 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-26 19:43:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91933464] [2020-10-26 19:43:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:34,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:39,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:43:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:40,479 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-26 19:43:42,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:42,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:42,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:42,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:42,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:42,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:42,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:43:42,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91933464] [2020-10-26 19:43:42,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:42,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:43:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173233400] [2020-10-26 19:43:42,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:43:42,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:43:42,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:43:42,097 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 32 states. [2020-10-26 19:43:42,761 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-26 19:43:43,257 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-26 19:43:43,791 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-26 19:43:44,054 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-26 19:43:45,364 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-26 19:43:46,051 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-10-26 19:43:46,293 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-26 19:43:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:47,401 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-26 19:43:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:43:47,402 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-26 19:43:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:47,403 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:43:47,403 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:43:47,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=357, Invalid=3425, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:43:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:43:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-26 19:43:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:43:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-10-26 19:43:47,419 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 52 [2020-10-26 19:43:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:47,420 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-10-26 19:43:47,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:43:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-10-26 19:43:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:47,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:47,420 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:47,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:43:47,421 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 7 times [2020-10-26 19:43:47,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:47,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162003435] [2020-10-26 19:43:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:47,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:47,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:43:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:52,775 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-26 19:43:52,919 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-26 19:43:53,216 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-26 19:43:53,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:53,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:53,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:53,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:53,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:53,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:53,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:43:53,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:53,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162003435] [2020-10-26 19:43:53,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:53,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:43:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144980512] [2020-10-26 19:43:53,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:43:53,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:43:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:43:53,644 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 22 states. [2020-10-26 19:43:55,128 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-26 19:43:55,403 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-26 19:43:55,561 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 19:43:55,745 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:43:56,065 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-26 19:43:56,261 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-26 19:43:56,440 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-26 19:43:56,706 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-26 19:43:56,945 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 19:43:57,305 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-26 19:43:57,462 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-26 19:43:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:58,254 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2020-10-26 19:43:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:43:58,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-26 19:43:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:58,257 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:43:58,257 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:43:58,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:43:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:43:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 84. [2020-10-26 19:43:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:43:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-26 19:43:58,277 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 52 [2020-10-26 19:43:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:58,278 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-26 19:43:58,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:43:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-26 19:43:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:43:58,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:58,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:58,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:43:58,279 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 10 times [2020-10-26 19:43:58,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:58,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312840954] [2020-10-26 19:43:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2821 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:44:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:44:01,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312840954] [2020-10-26 19:44:01,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:01,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:44:01,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214622240] [2020-10-26 19:44:01,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:44:01,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:44:01,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:01,296 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 14 states. [2020-10-26 19:44:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:01,943 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2020-10-26 19:44:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:44:01,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-26 19:44:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:01,945 INFO L225 Difference]: With dead ends: 188 [2020-10-26 19:44:01,945 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:44:01,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:44:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-10-26 19:44:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:44:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-26 19:44:01,968 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 54 [2020-10-26 19:44:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:01,968 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-26 19:44:01,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:44:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-26 19:44:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:44:01,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:01,969 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:01,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:44:01,970 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 11 times [2020-10-26 19:44:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:01,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211645156] [2020-10-26 19:44:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:44:06,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:44:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,542 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-26 19:44:07,909 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-26 19:44:08,151 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:44:08,323 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-26 19:44:08,713 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-26 19:44:09,237 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-26 19:44:10,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:10,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:10,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:44:10,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211645156] [2020-10-26 19:44:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:44:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678230212] [2020-10-26 19:44:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:44:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:44:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:44:10,627 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 34 states. [2020-10-26 19:44:11,710 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-26 19:44:14,299 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 19:44:14,665 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-26 19:44:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:16,156 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-10-26 19:44:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:44:16,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2020-10-26 19:44:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:16,158 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:44:16,159 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:44:16,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:44:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:44:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-26 19:44:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:44:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-26 19:44:16,177 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 59 [2020-10-26 19:44:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:16,178 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-26 19:44:16,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:44:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-26 19:44:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:44:16,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:16,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:16,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:44:16,179 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 8 times [2020-10-26 19:44:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:16,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135315259] [2020-10-26 19:44:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:44:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,841 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-26 19:44:22,207 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2020-10-26 19:44:22,598 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-26 19:44:22,925 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-26 19:44:23,155 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-26 19:44:23,464 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-26 19:44:23,654 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-26 19:44:23,961 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:44:24,191 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-26 19:44:24,399 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-26 19:44:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:25,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:25,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:25,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:25,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:25,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:25,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:25,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135315259] [2020-10-26 19:44:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:44:25,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469401816] [2020-10-26 19:44:25,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:44:25,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:44:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:44:25,249 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 30 states. [2020-10-26 19:44:26,155 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2020-10-26 19:44:26,419 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 36 [2020-10-26 19:44:26,686 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2020-10-26 19:44:27,216 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 29 [2020-10-26 19:44:27,405 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 27 [2020-10-26 19:44:27,614 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 26 [2020-10-26 19:44:27,855 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 30 [2020-10-26 19:44:28,078 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2020-10-26 19:44:28,288 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 32 [2020-10-26 19:44:28,522 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 34 [2020-10-26 19:44:28,747 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-10-26 19:44:29,411 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-26 19:44:30,476 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 100 [2020-10-26 19:44:31,022 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-26 19:44:31,296 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-26 19:44:31,714 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-26 19:44:32,567 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 89 [2020-10-26 19:44:32,803 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-26 19:44:33,357 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-26 19:44:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:34,558 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-26 19:44:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:44:34,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-10-26 19:44:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:34,561 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:44:34,561 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:44:34,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=703, Invalid=4267, Unknown=0, NotChecked=0, Total=4970 [2020-10-26 19:44:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:44:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2020-10-26 19:44:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:44:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-26 19:44:34,580 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 59 [2020-10-26 19:44:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:34,581 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-26 19:44:34,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:44:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-26 19:44:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:44:34,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:34,581 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:34,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:44:34,582 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1814283334, now seen corresponding path program 9 times [2020-10-26 19:44:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:34,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189140259] [2020-10-26 19:44:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:37,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:39,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:39,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:39,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:44:39,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:44:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:44:39,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:44:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:44:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:40,347 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-26 19:44:40,749 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-26 19:44:41,066 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-26 19:44:41,351 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-26 19:44:41,818 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-26 19:44:42,210 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2020-10-26 19:44:42,997 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-10-26 19:44:43,608 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2020-10-26 19:44:43,861 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-26 19:44:44,207 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-26 19:44:44,436 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2020-10-26 19:44:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:44,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:44,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:44,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:44:44,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189140259] [2020-10-26 19:44:44,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:44,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:44:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287595953] [2020-10-26 19:44:44,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:44:44,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:44:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:44:44,842 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 26 states. [2020-10-26 19:44:45,817 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-26 19:44:46,097 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-26 19:44:46,562 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-26 19:44:47,190 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-26 19:44:47,518 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-26 19:44:47,785 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-26 19:44:48,342 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 75 [2020-10-26 19:44:48,570 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 19:44:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:49,249 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2020-10-26 19:44:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:44:49,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-26 19:44:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:49,254 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:44:49,254 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:44:49,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:44:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:44:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-26 19:44:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:44:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-26 19:44:49,274 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 60 [2020-10-26 19:44:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:49,275 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-26 19:44:49,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:44:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-26 19:44:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:44:49,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:49,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:49,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:44:49,276 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 12 times [2020-10-26 19:44:49,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:49,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011919517] [2020-10-26 19:44:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4778 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:44:54,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:54,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:54,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:54,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:54,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:44:54,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011919517] [2020-10-26 19:44:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:54,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:44:54,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334227005] [2020-10-26 19:44:54,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:44:54,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:54,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:44:54,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:54,360 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 16 states. [2020-10-26 19:44:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:55,158 INFO L93 Difference]: Finished difference Result 213 states and 247 transitions. [2020-10-26 19:44:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:44:55,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-26 19:44:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:55,160 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:44:55,160 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:44:55,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:44:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-10-26 19:44:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:44:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-26 19:44:55,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 61 [2020-10-26 19:44:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:55,190 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-26 19:44:55,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:44:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-26 19:44:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:44:55,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:55,191 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:55,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:44:55,191 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 13 times [2020-10-26 19:44:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:55,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802267668] [2020-10-26 19:44:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:45:00,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:45:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,729 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-10-26 19:45:00,920 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-10-26 19:45:01,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:01,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:01,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:45:01,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802267668] [2020-10-26 19:45:01,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:01,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:45:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828642793] [2020-10-26 19:45:01,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:45:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:45:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:45:01,972 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 27 states. [2020-10-26 19:45:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:05,129 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2020-10-26 19:45:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:45:05,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:45:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:05,132 INFO L225 Difference]: With dead ends: 200 [2020-10-26 19:45:05,132 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:45:05,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=669, Invalid=2991, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:45:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:45:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 119. [2020-10-26 19:45:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:45:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-26 19:45:05,165 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 64 [2020-10-26 19:45:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:05,166 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-26 19:45:05,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:45:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-26 19:45:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:45:05,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:05,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:05,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:45:05,167 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 14 times [2020-10-26 19:45:05,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:05,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680457866] [2020-10-26 19:45:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:05,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:10,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5250 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:45:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:11,188 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-26 19:45:11,538 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:45:11,695 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-26 19:45:11,857 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-26 19:45:12,014 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-26 19:45:12,296 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:45:12,499 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-26 19:45:12,815 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-26 19:45:12,989 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-26 19:45:13,215 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-26 19:45:13,529 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-26 19:45:13,799 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-26 19:45:14,147 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-26 19:45:14,446 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-26 19:45:14,791 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-26 19:45:15,106 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-26 19:45:15,321 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-26 19:45:15,569 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-26 19:45:15,827 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-26 19:45:16,152 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-26 19:45:16,433 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-26 19:45:16,731 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-26 19:45:17,007 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-26 19:45:17,347 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-26 19:45:17,647 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-10-26 19:45:17,934 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-26 19:45:18,202 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-26 19:45:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:19,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:19,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:19,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:19,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:19,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:19,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:19,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680457866] [2020-10-26 19:45:19,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:19,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:45:19,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001614669] [2020-10-26 19:45:19,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:45:19,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:45:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:45:19,455 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 46 states. [2020-10-26 19:45:20,815 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 67 [2020-10-26 19:45:22,447 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-10-26 19:45:23,533 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 88 [2020-10-26 19:45:24,603 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 90 [2020-10-26 19:45:25,637 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 115 [2020-10-26 19:45:26,853 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 121 [2020-10-26 19:45:27,889 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 103 [2020-10-26 19:45:28,851 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 108 [2020-10-26 19:45:29,662 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2020-10-26 19:45:30,691 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2020-10-26 19:45:30,968 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-26 19:45:31,903 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2020-10-26 19:45:32,380 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-10-26 19:45:33,084 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 104 [2020-10-26 19:45:33,502 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-26 19:45:34,050 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2020-10-26 19:45:34,435 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-26 19:45:34,998 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-26 19:45:35,507 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 63 [2020-10-26 19:45:36,512 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 88 [2020-10-26 19:45:36,925 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-26 19:45:37,737 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 93 [2020-10-26 19:45:38,289 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-26 19:45:39,191 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-26 19:45:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:40,111 INFO L93 Difference]: Finished difference Result 156 states and 181 transitions. [2020-10-26 19:45:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:45:40,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-26 19:45:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:40,114 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:45:40,114 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:45:40,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=693, Invalid=5007, Unknown=0, NotChecked=0, Total=5700 [2020-10-26 19:45:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:45:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2020-10-26 19:45:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:45:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-26 19:45:40,148 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 66 [2020-10-26 19:45:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:40,148 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-26 19:45:40,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:45:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-26 19:45:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:45:40,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:40,149 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:40,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:45:40,150 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1936361116, now seen corresponding path program 10 times [2020-10-26 19:45:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125010903] [2020-10-26 19:45:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:41,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:41,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking...