/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:52:38,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:52:38,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:52:38,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:52:38,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:52:38,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:52:38,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:52:38,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:52:38,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:52:38,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:52:38,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:52:38,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:52:38,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:52:38,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:52:38,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:52:38,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:52:38,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:52:38,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:52:38,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:52:38,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:52:38,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:52:38,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:52:38,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:52:38,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:52:38,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:52:38,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:52:38,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:52:38,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:52:38,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:52:38,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:52:38,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:52:38,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:52:38,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:52:38,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:52:38,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:52:38,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:52:38,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:52:38,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:52:38,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:52:38,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:52:38,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:52:38,748 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 [2020-10-27 18:52:38,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:52:38,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:52:38,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:52:38,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:52:38,814 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:52:38,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:52:38,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:52:38,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:52:38,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:52:38,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:52:38,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:52:38,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:52:38,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:52:38,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:52:38,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:52:38,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:52:38,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:52:38,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:52:38,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:52:38,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:52:38,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:52:38,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:52:38,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:52:38,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:52:38,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:52:38,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:52:38,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:52:38,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:52:38,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:52:38,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:52:39,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:52:39,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:52:39,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:52:39,317 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:52:39,318 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:52:39,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-27 18:52:39,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0930cc4bd/cfab2321378941e2890d4125b501daaa/FLAG7dabe627e [2020-10-27 18:52:40,363 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:52:40,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-27 18:52:40,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0930cc4bd/cfab2321378941e2890d4125b501daaa/FLAG7dabe627e [2020-10-27 18:52:40,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0930cc4bd/cfab2321378941e2890d4125b501daaa [2020-10-27 18:52:40,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:52:40,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:52:40,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:52:40,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:52:40,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:52:40,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:52:40" (1/1) ... [2020-10-27 18:52:40,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346f6089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:40, skipping insertion in model container [2020-10-27 18:52:40,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:52:40" (1/1) ... [2020-10-27 18:52:40,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:52:41,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:52:42,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:52:42,172 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:52:42,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:52:42,730 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:52:42,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42 WrapperNode [2020-10-27 18:52:42,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:52:42,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:52:42,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:52:42,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:52:42,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:42,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:42,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:42,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:42,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:43,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:43,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (1/1) ... [2020-10-27 18:52:43,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:52:43,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:52:43,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:52:43,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:52:43,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (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 [2020-10-27 18:52:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:52:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:52:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:52:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:52:43,165 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:52:43,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:52:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:52:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:52:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:52:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:52:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:52:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:52:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:52:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:52:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:52:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:52:52,133 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:52:52,137 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:52:52,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:52:52 BoogieIcfgContainer [2020-10-27 18:52:52,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:52:52,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:52:52,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:52:52,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:52:52,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:52:40" (1/3) ... [2020-10-27 18:52:52,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d011547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:52:52, skipping insertion in model container [2020-10-27 18:52:52,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:52:42" (2/3) ... [2020-10-27 18:52:52,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d011547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:52:52, skipping insertion in model container [2020-10-27 18:52:52,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:52:52" (3/3) ... [2020-10-27 18:52:52,155 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label22.c [2020-10-27 18:52:52,168 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:52:52,176 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:52:52,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:52:52,236 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:52:52,236 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:52:52,236 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:52:52,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:52:52,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:52:52,237 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:52:52,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:52:52,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:52:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:52:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 18:52:52,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:52,282 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, 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] [2020-10-27 18:52:52,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1837215466, now seen corresponding path program 1 times [2020-10-27 18:52:52,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:52,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647805041] [2020-10-27 18:52:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:53,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:53,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 18:52:53,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:53,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-27 18:52:53,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:53,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:52:53,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:52:53,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:52:53,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:52:53,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:53,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:53,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:52:53,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:52:53,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:52:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647805041] [2020-10-27 18:52:53,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:52:53,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:52:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068818697] [2020-10-27 18:52:53,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:52:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:52:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:52:53,637 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:53:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:07,279 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:53:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:07,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 18:53:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:07,306 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:53:07,306 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:53:07,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:53:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:53:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:53:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:53:07,489 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 58 [2020-10-27 18:53:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:07,492 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:53:07,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:53:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:53:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 18:53:07,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:07,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:07,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:53:07,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1532341718, now seen corresponding path program 1 times [2020-10-27 18:53:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:07,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127185087] [2020-10-27 18:53:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:09,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:09,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 18:53:09,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:53:09,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1875 [2020-10-27 18:53:09,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:09,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:53:09,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:53:09,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:09,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:09,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:09,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:09,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:53:09,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:09,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:09,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:09,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:09,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:09,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:53:09,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:09,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127185087] [2020-10-27 18:53:09,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:09,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:09,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2836677] [2020-10-27 18:53:09,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:09,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:09,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:09,935 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:53:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:20,875 INFO L93 Difference]: Finished difference Result 2901 states and 4503 transitions. [2020-10-27 18:53:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:20,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-27 18:53:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:20,890 INFO L225 Difference]: With dead ends: 2901 [2020-10-27 18:53:20,890 INFO L226 Difference]: Without dead ends: 1915 [2020-10-27 18:53:20,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-10-27 18:53:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1890. [2020-10-27 18:53:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-10-27 18:53:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2684 transitions. [2020-10-27 18:53:20,963 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2684 transitions. Word has length 129 [2020-10-27 18:53:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:20,964 INFO L481 AbstractCegarLoop]: Abstraction has 1890 states and 2684 transitions. [2020-10-27 18:53:20,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2684 transitions. [2020-10-27 18:53:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 18:53:20,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:20,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:20,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:53:20,968 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:20,969 INFO L82 PathProgramCache]: Analyzing trace with hash -223611657, now seen corresponding path program 1 times [2020-10-27 18:53:20,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:20,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133645767] [2020-10-27 18:53:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:22,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:22,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:53:22,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:53:22,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-27 18:53:22,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:53:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:53:22,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:22,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:22,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:22,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:22,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:22,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:22,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:53:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:22,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133645767] [2020-10-27 18:53:22,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:22,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:22,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841521168] [2020-10-27 18:53:22,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:22,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:22,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:22,721 INFO L87 Difference]: Start difference. First operand 1890 states and 2684 transitions. Second operand 5 states. [2020-10-27 18:53:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:40,105 INFO L93 Difference]: Finished difference Result 3782 states and 5766 transitions. [2020-10-27 18:53:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:40,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-27 18:53:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:40,125 INFO L225 Difference]: With dead ends: 3782 [2020-10-27 18:53:40,126 INFO L226 Difference]: Without dead ends: 2790 [2020-10-27 18:53:40,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2020-10-27 18:53:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2784. [2020-10-27 18:53:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-10-27 18:53:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3796 transitions. [2020-10-27 18:53:40,219 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3796 transitions. Word has length 132 [2020-10-27 18:53:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:40,219 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 3796 transitions. [2020-10-27 18:53:40,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3796 transitions. [2020-10-27 18:53:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 18:53:40,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:40,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:40,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:53:40,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash -342864429, now seen corresponding path program 1 times [2020-10-27 18:53:40,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:40,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905636958] [2020-10-27 18:53:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:41,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:41,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 18:53:41,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:53:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-27 18:53:41,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:53:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:53:41,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:53:41,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:41,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:41,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:41,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:53:41,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:41,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:41,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:41,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:41,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:41,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:41,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:41,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:53:41,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905636958] [2020-10-27 18:53:41,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:41,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79827774] [2020-10-27 18:53:41,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:41,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:41,735 INFO L87 Difference]: Start difference. First operand 2784 states and 3796 transitions. Second operand 5 states. [2020-10-27 18:53:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:56,361 INFO L93 Difference]: Finished difference Result 7766 states and 10803 transitions. [2020-10-27 18:53:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:56,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-27 18:53:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:56,394 INFO L225 Difference]: With dead ends: 7766 [2020-10-27 18:53:56,398 INFO L226 Difference]: Without dead ends: 4988 [2020-10-27 18:53:56,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2020-10-27 18:53:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4982. [2020-10-27 18:53:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4982 states. [2020-10-27 18:53:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6337 transitions. [2020-10-27 18:53:56,581 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6337 transitions. Word has length 134 [2020-10-27 18:53:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:56,583 INFO L481 AbstractCegarLoop]: Abstraction has 4982 states and 6337 transitions. [2020-10-27 18:53:56,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6337 transitions. [2020-10-27 18:53:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 18:53:56,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:56,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:56,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:53:56,587 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2107512678, now seen corresponding path program 1 times [2020-10-27 18:53:56,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:56,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917189181] [2020-10-27 18:53:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:56,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:57,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 18:53:58,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:53:58,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-27 18:53:58,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:58,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:53:58,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:53:58,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:58,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:58,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:58,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:53:58,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:58,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:53:58,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:58,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917189181] [2020-10-27 18:53:58,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:58,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544712740] [2020-10-27 18:53:58,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:58,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:58,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:58,515 INFO L87 Difference]: Start difference. First operand 4982 states and 6337 transitions. Second operand 5 states. [2020-10-27 18:54:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:10,129 INFO L93 Difference]: Finished difference Result 8682 states and 11144 transitions. [2020-10-27 18:54:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:10,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-10-27 18:54:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:10,157 INFO L225 Difference]: With dead ends: 8682 [2020-10-27 18:54:10,158 INFO L226 Difference]: Without dead ends: 4986 [2020-10-27 18:54:10,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2020-10-27 18:54:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 4982. [2020-10-27 18:54:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4982 states. [2020-10-27 18:54:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6331 transitions. [2020-10-27 18:54:10,302 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6331 transitions. Word has length 137 [2020-10-27 18:54:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:10,303 INFO L481 AbstractCegarLoop]: Abstraction has 4982 states and 6331 transitions. [2020-10-27 18:54:10,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6331 transitions. [2020-10-27 18:54:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 18:54:10,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:10,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:54:10,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:54:10,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2029533558, now seen corresponding path program 1 times [2020-10-27 18:54:10,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:10,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713567972] [2020-10-27 18:54:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:11,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 18:54:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:54:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-27 18:54:11,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:54:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:54:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:11,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:11,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:11,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:11,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:11,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:54:11,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:11,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:11,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:11,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:11,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:54:11,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:54:11,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:11,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:11,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:54:11,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:11,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713567972] [2020-10-27 18:54:11,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:11,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550195781] [2020-10-27 18:54:11,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:11,975 INFO L87 Difference]: Start difference. First operand 4982 states and 6331 transitions. Second operand 5 states. [2020-10-27 18:54:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:30,454 INFO L93 Difference]: Finished difference Result 10416 states and 13708 transitions. [2020-10-27 18:54:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:30,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 18:54:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:30,493 INFO L225 Difference]: With dead ends: 10416 [2020-10-27 18:54:30,493 INFO L226 Difference]: Without dead ends: 6767 [2020-10-27 18:54:30,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2020-10-27 18:54:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 6760. [2020-10-27 18:54:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6760 states. [2020-10-27 18:54:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 8367 transitions. [2020-10-27 18:54:30,684 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 8367 transitions. Word has length 155 [2020-10-27 18:54:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:30,685 INFO L481 AbstractCegarLoop]: Abstraction has 6760 states and 8367 transitions. [2020-10-27 18:54:30,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 8367 transitions. [2020-10-27 18:54:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 18:54:30,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:30,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:54:30,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:54:30,690 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:30,691 INFO L82 PathProgramCache]: Analyzing trace with hash 881693998, now seen corresponding path program 1 times [2020-10-27 18:54:30,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:30,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146230238] [2020-10-27 18:54:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:31,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:35,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:35,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 18:54:35,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:54:35,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:54:35,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:35,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:35,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 18:54:35,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 18:54:35,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:35,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:35,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:35,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:35,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:54:35,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:35,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:54:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:36,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:36,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 18:54:36,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 18:54:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:36,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146230238] [2020-10-27 18:54:36,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:36,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911701354] [2020-10-27 18:54:36,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:36,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:36,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:36,215 INFO L87 Difference]: Start difference. First operand 6760 states and 8367 transitions. Second operand 5 states. [2020-10-27 18:54:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:55,870 INFO L93 Difference]: Finished difference Result 14851 states and 18879 transitions. [2020-10-27 18:54:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:55,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-27 18:54:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:55,923 INFO L225 Difference]: With dead ends: 14851 [2020-10-27 18:54:55,923 INFO L226 Difference]: Without dead ends: 9424 [2020-10-27 18:54:55,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2020-10-27 18:54:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9408. [2020-10-27 18:54:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9408 states. [2020-10-27 18:54:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9408 states to 9408 states and 11624 transitions. [2020-10-27 18:54:56,196 INFO L78 Accepts]: Start accepts. Automaton has 9408 states and 11624 transitions. Word has length 159 [2020-10-27 18:54:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:56,197 INFO L481 AbstractCegarLoop]: Abstraction has 9408 states and 11624 transitions. [2020-10-27 18:54:56,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9408 states and 11624 transitions. [2020-10-27 18:54:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 18:54:56,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:56,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:54:56,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:54:56,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash 530773137, now seen corresponding path program 1 times [2020-10-27 18:54:56,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:56,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364770781] [2020-10-27 18:54:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:56,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:57,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:57,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 18:54:57,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:54:57,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-27 18:54:57,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:57,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 18:54:57,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:54:57,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:57,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:57,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:57,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:57,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:54:57,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:57,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:58,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:58,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 18:54:58,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:58,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 18:54:58,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:58,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:58,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 18:54:58,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:58,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364770781] [2020-10-27 18:54:58,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:58,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:58,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438095369] [2020-10-27 18:54:58,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:58,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:58,112 INFO L87 Difference]: Start difference. First operand 9408 states and 11624 transitions. Second operand 5 states. [2020-10-27 18:55:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:55:19,090 INFO L93 Difference]: Finished difference Result 24925 states and 31473 transitions. [2020-10-27 18:55:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:55:19,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-27 18:55:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:55:19,156 INFO L225 Difference]: With dead ends: 24925 [2020-10-27 18:55:19,157 INFO L226 Difference]: Without dead ends: 16847 [2020-10-27 18:55:19,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:55:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16847 states. [2020-10-27 18:55:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16847 to 12944. [2020-10-27 18:55:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12944 states. [2020-10-27 18:55:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 16558 transitions. [2020-10-27 18:55:19,622 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 16558 transitions. Word has length 160 [2020-10-27 18:55:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:55:19,622 INFO L481 AbstractCegarLoop]: Abstraction has 12944 states and 16558 transitions. [2020-10-27 18:55:19,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:55:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 16558 transitions. [2020-10-27 18:55:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 18:55:19,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:55:19,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:55:19,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:55:19,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:55:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:55:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -177320221, now seen corresponding path program 1 times [2020-10-27 18:55:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:55:19,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805644950] [2020-10-27 18:55:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:55:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:21,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:21,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:55:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:55:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-27 18:55:21,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 18:55:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:55:21,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:21,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:55:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:21,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:21,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:21,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:55:21,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:55:21,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:21,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:21,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:55:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:21,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:21,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 18:55:21,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:55:21,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805644950] [2020-10-27 18:55:21,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:55:21,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:55:21,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386379665] [2020-10-27 18:55:21,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:55:21,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:55:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:55:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:55:21,500 INFO L87 Difference]: Start difference. First operand 12944 states and 16558 transitions. Second operand 5 states. [2020-10-27 18:55:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:55:43,161 INFO L93 Difference]: Finished difference Result 28511 states and 37809 transitions. [2020-10-27 18:55:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:55:43,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 18:55:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:55:43,239 INFO L225 Difference]: With dead ends: 28511 [2020-10-27 18:55:43,239 INFO L226 Difference]: Without dead ends: 17335 [2020-10-27 18:55:43,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:55:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17335 states. [2020-10-27 18:55:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17335 to 15599. [2020-10-27 18:55:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15599 states. [2020-10-27 18:55:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15599 states to 15599 states and 19858 transitions. [2020-10-27 18:55:43,670 INFO L78 Accepts]: Start accepts. Automaton has 15599 states and 19858 transitions. Word has length 161 [2020-10-27 18:55:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:55:43,671 INFO L481 AbstractCegarLoop]: Abstraction has 15599 states and 19858 transitions. [2020-10-27 18:55:43,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:55:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 15599 states and 19858 transitions. [2020-10-27 18:55:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 18:55:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:55:43,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:55:43,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:55:43,682 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:55:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:55:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1618449717, now seen corresponding path program 1 times [2020-10-27 18:55:43,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:55:43,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366433475] [2020-10-27 18:55:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:55:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:43,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:48,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 18:55:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:55:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:48,929 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-27 18:55:49,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:55:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:49,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:49,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:55:49,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:49,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:55:49,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:49,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:49,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:49,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:49,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:49,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:55:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:49,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:49,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:49,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:55:49,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 18:55:49,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:49,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:49,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:55:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:55:49,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:49,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:55:49,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 18:55:49,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366433475] [2020-10-27 18:55:49,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:55:49,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:55:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418836485] [2020-10-27 18:55:49,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:55:49,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:55:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:55:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:55:49,449 INFO L87 Difference]: Start difference. First operand 15599 states and 19858 transitions. Second operand 5 states. [2020-10-27 18:55:51,677 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 18:56:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:56:09,666 INFO L93 Difference]: Finished difference Result 29466 states and 37584 transitions. [2020-10-27 18:56:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:56:09,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-10-27 18:56:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:56:09,728 INFO L225 Difference]: With dead ends: 29466 [2020-10-27 18:56:09,728 INFO L226 Difference]: Without dead ends: 15603 [2020-10-27 18:56:09,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:56:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15603 states. [2020-10-27 18:56:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15603 to 15599. [2020-10-27 18:56:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15599 states. [2020-10-27 18:56:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15599 states to 15599 states and 19845 transitions. [2020-10-27 18:56:10,191 INFO L78 Accepts]: Start accepts. Automaton has 15599 states and 19845 transitions. Word has length 207 [2020-10-27 18:56:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:56:10,192 INFO L481 AbstractCegarLoop]: Abstraction has 15599 states and 19845 transitions. [2020-10-27 18:56:10,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:56:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15599 states and 19845 transitions. [2020-10-27 18:56:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 18:56:10,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:10,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:56:10,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:56:10,202 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1948523496, now seen corresponding path program 1 times [2020-10-27 18:56:10,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:10,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189292670] [2020-10-27 18:56:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:12,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:13,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:15,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:15,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 18:56:15,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:15,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:15,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:15,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:15,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:56:15,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:56:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:56:15,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:56:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:15,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:15,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:56:15,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:15,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 18:56:15,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:56:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:56:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:15,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 18:56:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:15,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:15,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:56:15,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:15,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 18:56:15,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:15,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:15,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:56:15,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 18:56:15,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189292670] [2020-10-27 18:56:15,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:56:15,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:56:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106594580] [2020-10-27 18:56:15,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:56:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:56:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:56:15,719 INFO L87 Difference]: Start difference. First operand 15599 states and 19845 transitions. Second operand 5 states.